Macrocyclic compounds having nitrogen-containing linkages

ABSTRACT

Novel macrocyclic compounds are constructed to include a ring or ring system having two bridgehead atoms with a bridge extending between the bridgehead atoms. Located in at least the bridge are two or more nitrogenous moieties that are derivatized with chemical functional groups. The ring or ring systems can include further nitrogenous moieties, either as ring atoms or on pendant groups attached to the ring. These can also be derivatized with chemical functional groups. The totality of the chemical functional groups imparts certain conformational and other properties to the compounds. In accordance with certain embodiments of the invention, libraries of such compounds are prepared utilizing permutations and combinations of the chemical functional groups and the nitrogenous moieties to build complexity into the library.

FIELD OF THE INVENTION

This invention relates to macrocyclic compounds and libraries of these compounds. The macrocyclic compounds of the invention have a plurality of nitrogenous sites that are derivatized by reaction with an active form of a reactant compounds. The reactant compound, upon covalently binding to the macrocyclic nitrogenous substrate, are used to introduce diversity into the macrocyclic compound. The reactant compounds are selected to be compounds that have, aside from a group capable of reacting with a nitrogenous species, a further functional group thereon that gives each individual compound at least one property that renders it diverse as compared to the other reactant compounds. Hence the incoming reactant compound bearing a chemical functional moiety imparts diversity to the macrocyclic compound and, upon bonding with the macrocycle, its residue can be referred to as a pendant chemical functional group.

The addition of the chemical functional groups at the several nitrogenous sites on the macrocyclic compound yields a macrocyclic compound having a unique set of properties. These properties include the overall global shape, the conformational space, electron density, dipole moment and ability of the compound to interact with enzyme pockets and other binding sites and other similar properties. Combinatorialized libraries of the macrocycles are synthesized having various permutations and combinations of the several chemical functional groups at the nitrogenous sites. Such synthesis is effected at each of the nitrogenous sites by presenting each nitrogenous site with several of the reactant compounds such that combinatorial mixtures are obtained. The libraries are deconvoluted to yield unique macrocyclic compounds. Preferred macrocycles of the invention have cyclophane-like structures.

The chemical functional groups on the macrocyclic compounds of the invention provide for binding of the compounds to proteins, including enzymes, nucleic acids, lipids and other biological targets. In preferred embodiments, the compounds of the invention act as inhibitors of pathogens such as virus, mycobacterium, bacteria (gram negative and gram positive), protozoa and parasites; as inhibitors of ligand-receptor interactions such as PDGF (platelet derived growth factor), LTB₄ (leukotriene B₄), IL-6 and complement C5_(A); as inhibitors of protein/protein interactions including transcription factors such as p50 (NFκB protein) and fos/jun; as inhibitors of enzymes such as phospholipase A₂; and for the inhibition of cell-based interactions including ICAM induction (using inducers such as IL1-β, TNF and LPS). In other preferred embodiments, the compounds of the invention are used as diagnostic reagents, including diagnostic reagents in the tests for each of the above noted systems, and as reagents in assays and as probes. In even further preferred embodiments, the compounds of the invention are used as metal chelators and contrast agent carriers. In even further preferred embodiments, the compounds of the invention are used as herbicides and insecticides.

BACKGROUND OF THE INVENTION

Traditional processes of drug discovery involve the screening of complex fermentation broths and plant extracts for a desired biological activity or the chemical synthesis of many new compounds for evaluation as potential drugs. The advantage of screening mixtures from biological sources is that a large number of compounds are screened simultaneously, in some cases leading to the discovery of novel and complex natural products with activity that could not have been predicted otherwise. The disadvantages are that many different samples must be screened and numerous purifications must be carried out to identify the active component, often present only in trace amounts. On the other hand, laboratory syntheses give unambiguous products, but the preparation of each new structure requires significant amounts of resources. Generally, the de novo design of active compounds based on the high resolution structures of enzymes has not been successful.

It is, thus, now widely appreciated that combinatorial libraries are useful per se and that such libraries and compounds comprising them have great commercial importance. Indeed, a branch of chemistry has developed to exploit the many commercial aspects of combinatorial libraries.

In order to maximize the advantages of each classical approach, new strategies for combinatorial deconvolution have been developed independently by several groups. Selection techniques have been used with libraries of peptides (Geysen, H. M., Rodda, S. J., Mason, T. J., Tribbick, G. and Schoofs, P. G., J. Immun. Meth. 1987, 102, 259-274; Houghten, R. A., Pinilla, C., Blondelle, S. E., Appel, J. R., Dooley, C. T. and Cuervo, J. H., Nature, 1991, 354, 84-86; Owens, R. A., Gesellchen, P. D., Houchins, B. J. and DiMarchi, R. D., Biochem. Biophys. Res. Commun., 1991, 181, 402-408; Doyle, M. V., PCT WO 94/28424; Brennan, T. M., PCT WO 94/27719); nucleic acids (Wyatt, J. R., et al., Proc. Natl. Acad. Sci. USA, 1994, 91, 1356-1360; Ecker, D. J., Vickers, T. A., Hanecak, R., Driver, V. and Anderson, K., Nucleic Acids Res., 1993, 21, 1853-1856); nonpeptides and small molecules (Simon, R. J., et al., Proc. Natl. Acad. Sci. USA, 1992, 89, 9367-9371; Zuckermann, R. N., et al., J. Amer. Chem. Soc., 1992, 114, 10646-10647; Bartlett, Santi, Simon, PCT WO91/19735; Ohlmeyer, M. H., et al., Proc. Natl. Acad. Sci. USA, 1993, 90, 10922-10926; DeWitt, S. H., Kiely, J. S., Stankovic, C. J., Schroeder, M. C. Reynolds Cody, D. M. and Pavia, M. R., Proc. Natl. Acad. Sci. USA, 1993, 90, 6909-6913; Cody et al., U.S. Pat. No. 5,324,483; Houghten et al., PCT WO 94/26775; Ellman, U.S. Pat. No. 5,288,514; Still et al., PCT WO 94/08051; Kauffman et al., PCT WO 94/24314; Carell, T., Wintner, D. A., Bashir-Hashemi, A. and Rebek, J., Angew. Chem. Int. Ed. Engel., 1994, 33, 2059-2061; Carell, T., Wintner, D. A. and Rebek, J., Angew. Chem. Int. Ed. Engel., 1994, 33, 2061-2064; Lebl, et al., PCT WO 94/28028). We have developed certain nitrogen coupled chemistries that we utilized to prepare a class of compounds we refer to as “oligonucleosides.” We have described these compounds in previous patent applications including published PCT applications WO 92/20822 (PCT US92/04294) and WO 94/22454 (PCT US94/03313). These chemistries included amine linkages, hydroxylamine linkages, hydrazino linkages and other nitrogen based linkages.

A review of the above references reveals that the most advanced of these techniques are those for selection of peptides and nucleic acids. Several groups are working on selection of heterocycles such as benzodiazepines. With the exception of Rebek et al., scant attention has been given to combinatorial discovery of other types of molecules. No combinatorial discovery approaches have been reported for non-linear (non-peptide, non-nucleic acid) macromolecules.

The majority of the techniques reported to date involve iterative synthesis and screening of increasingly simplified subsets of oligomers. Monomers or sub-monomers that have been utilized include amino acids, amino acid-like molecules, i.e. carbamate precursors, and nucleotides, both of which are bifunctional. Utilizing these techniques, libraries have been assayed for activity in either cell-based assays, or for binding and/or inhibition of purified protein targets.

A technique, called SURF™ (Synthetic Unrandomization of Randomized Fragments), involves the synthesis of subsets of oligomers containing a known residue at one fixed position and equimolar mixtures of residues at all other positions. For a library of oligomers four residues long containing three monomers (A, B, C), three subsets would be synthesized (NNAN, NNBN, NNCN, where N represents equal incorporation of each of the three monomers). Each subset is then screened in a functional assay and the best subset is identified (e.g. NNAN). A second set of libraries is synthesized and screened, each containing the fixed residue from the previous round, and a second fixed residue (e.g. ANAN, BNAN, CNAN). Through successive rounds of screening and synthesis, a unique sequence with activity in the functional assay can be identified. The SURF™ technique is described in Ecker, D. J., Vickers, T. A., Hanecak, R., Driver, V. & Anderson, K., Nucleic Acids Res., 1993, 21, 1853-1856. The SURF™ method is further described in PCT patent application WO 93/04204, the entire disclosure of which is herein incorporated by reference.

The combinatorial chemical approach that has been most utilized to date, utilizes an oligomerization from a solid support using monomeric units and a defined connecting chemistry, i.e. a solid support monomer approach. This approach has been utilized in the synthesis of libraries of peptides, peptoids, carbamates and vinylogous peptides connected by amide or carbamate linkages or nucleic acids connected by phosphate linkages as exemplified by the citations in previous paragraphs above. A mixture of oligomers (pool or library) is obtained from the addition of a mixture of activated monomers during the coupling step or from the coupling of individual monomers with a portion of the support (bead splitting) followed by remixing of the support and subsequent splitting for the next coupling. In this monomeric approach, each monomeric unit would carry a tethered letter, i.e., a functional group for interaction with the target. Further coupling chemistry that allows for the insertion of a tethered letter at a chemically activated intermediate stage is referred to as the sub-monomer approach.

The diversity of the oligomeric pool is represented by the inherent physical properties of each monomer, the number of different monomers mixed at each coupling, the physical properties of the chemical bonds arising from the coupling chemistry (the backbone), the number of couplings (length of oligomer), and the interactions of the backbone and monomer chemistries. Taken together, these interactions provide a unique conformation for each individual molecule.

There remains a need in the art for molecules which have fixed preorganized geometry that matches that of targets such as proteins and enzymes, nucleic acids, lipids and other targets. The backbone of such molecules should be rigid with some flexibility, and such molecules should be easy to construct in solution or via automated synthesis on solid support.

OBJECTS OF THE INVENTION

It is an object of the invention to provide macrocyclic compounds for diagnostic, research, and therapeutic use.

It is a further object of the invention to provide macrocyclic compounds that have a plurality of nitrogenous sites for introducing chemical functional groups into the macrocycle to provide “diversity” to the basic macrocycle.

It is yet another object of the invention to provide methods for preparing libraries of diversified macrocyclic compounds.

It is a still further object of the invention to provide libraries of combinatorialized macrocyclic compounds.

These and other objects will become apparent to persons of ordinary skill in the art from a review of the present specification and the appended claims.

SUMMARY OF THE INVENTION

The present invention provides novel cyclophane-like compounds comprising an aromatic, alicyclic or heterocyclic ring system having two bridgehead atoms that are connected to each other via a bridge containing at least two nitrogenous moieties bearing chemical functional groups.

In certain embodiments, each chemical functional group is, independently, of structure I:

—T—L;  I

where T is a single bond, a methylene group or a group having structure II:

—{[CR¹R²]_(m)—B—[CR¹R²]_(n)—[C(D)]_(p)—E—}_(q)—  II

where:

D is ═O, ═S, ═NR³;

B and E, independently, are a single bond, CH═CH, C≡C, O, S, NR³, C₆-C₁₄ aryl;

each R¹, R² and R³ are, independently, H, alkyl or haloalkyl having 1 to about 10 carbon atoms; alkenyl having 2 to about 10 carbon atoms; alkynyl having 2 to about 10 carbon atoms; or aryl having 7 to about 14 carbon atoms;

m and n, independently, are zero to 5;

p is zero or 1;

q is 1 to about 10; and

L is, H; C₂-C₁₀ alkyl or substituted alkyl, C₂-C₁₀ alkenyl or substituted alkenyl, C₂-C₁₀ alkynyl or substituted alkynyl, C₄-C₇ carbocyclic alkyl, alkenyl or alkynyl or substituted carbocyclic, or C₆-C₁₄ aryl or substituted aryl where the substituent groups are selected from hydroxyl, amino, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl, or alkynyl groups; an ether having 2 to 10 carbon atoms and 1 to 4 oxygen or sulfur atoms; a nitrogen, sulfur or oxygen containing heterocycle; a metal coordination group; a conjugate group; halogen; hydroxyl (OH); thiol (SH); keto (C═O); carboxyl (COOH); amide (CONR); amidine (C(═NH)NRR); guanidine (NHC(═NH)NRR); glutamyl CH(NRR)(C(═O)OR); nitrate (ONO₂); nitro (NO₂); nitrile (CN); trifluoromethyl (CF₃); trifluoromethoxy (OCF₃); O-alkyl; S-alkyl; NH-alkyl; N-dialkyl; O-aralkyl; S-aralkyl; NH-alkyl; amino (NH₂); azido (N₃); hydrazino (NHNH₂); hydroxylamino (ONH₂); sulfoxide (SO); sulfone (SO₂); sulfide (S—); disulfide (S—S); silyl; a nucleosidic base; an amino acid side chain; a carbohydrate; a drug; or group capable of hydrogen bonding. In certain preferred embodiments of the present invention, compounds of Structure III are provided:

where X is, independently, —N(TL)—, —N(TL)—O—, —N(TL)—NR—, —N(TL)—SO₂—, —N(TL)—SO—, —N(TL)S—, —N(TL)—C(O)—, —N(TL)—NH—C(O)—, —N(TL)—C(O)—O—, or —N(TL)—(CO)—NR—;

J and G, independently, are [CH₂]_(x), ═N, NR, O, or S;

x is 1-5;

z is 1-9;

y is 0-3;

R is H or alkyl;

Q is an aromatic, heterocyclic, or alicyclic ring; and

TL is H, a chemical functional group or a tether, such as an amino acid side chain; a metal coordination group; or C₂-C₁₀ alkyl or substituted alkyl, C₂-C₁₀ alkenyl or substituted alkenyl, C₂-C₁₀ alkynyl or substituted alkynyl, C₄-C₇ carbocyclic alkyl or alkenyl or substituted carbocyclic, C₆-C₁₄ aryl or substituted aryl, C₇-C₁₄ aralkyl or substituted aralkyl and where the substituent groups are selected from hydroxyl, carbonyl, carboxyl, amide, amino, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl, or alkynyl groups.

Combinatorial synthetic strategies offer the potential to generate and screen libraries comprising extremely large numbers of compounds and identify individual molecules with desired properties. In certain embodiments of the invention, cyclophane-like compounds are provided that comprise part of a library of such compounds bearing varied chemical functional groups. Further, cyclophane-like compounds are provided that have at least three nitrogenous moieties bearing at least three different chemical functional groups thereon.

In accordance with some embodiments of the present invention, a library of macrocyclic compounds comprising a plurality of molecules having an identical macrocyclic structure, a plurality of at least two different types of nitrogenous moieties and a plurality of chemical functional groups covalently bonded to the nitrogenous moieties.

Methods of the present invention are useful for generating a library of macromolecules. These methods comprise selecting a macromolecule having a ring or ring system, a bridge connecting the two bridgehead atoms and a plurality of nitrogenous moieties located within the macromolecule. These methods further comprise selection and reaction of a plurality of chemical functional group reactants for introduction of chemical functional groups on the nitrogenous moieties.

BRIEF DESCRIPTION OF THE DRAWINGS

The numerous objects and advantages of the present invention may be better understood by those skilled in the art by reference to the accompanying figures, in which:

FIG. 1 is a synthetic scheme for the synthesis of macrocyclic compounds according to the invention;

FIG. 2 shows processes for a first round of synthesis for preparing libraries of compounds according to the invention;

FIG. 3 shows processes for a second round of synthesis for preparing libraries of compounds according to the invention;

FIG. 4 shows processes for a third round of synthesis for preparing libraries of compounds according to the invention; and

FIG. 5 shows processes for a fourth round of synthesis for preparing libraries of compounds according to the invention.

FIG. 6 depicts certain embodiments in accordance with the invention.

DETAILED DESCRIPTION OF THE INVENTION

Various natural, multi-ring, macrocyclic structures are known to have useful properties. Many of these are very complex compounds such as the vancomycin and amphotericin families of antibiotics. Vancomycin might also be classified as a cyclic peptide. Other cyclic peptides include phalloidin, obtained from the poisonous toadstool, Amanita phalloides. Further antibiotic macrocycles having more than one ring include rifamycin, rifamycin S, ansatrienin, napthomycin A and others. Also, multi-ring macrocycles, such a gloeosporon, are known to possess fungistatic properties. Other multi-ring macrocyclic compounds have shown antitumor activity including bouvardin, deoxybouvardin and certain macrocycles from the red algae Phacelocaspus labillardieri and bryostatin 8. Certain alkaloids, e.g. lunarine, are also multi-ring macrocycles. Many crown macrocycles, including aza-crown macrocycles include multi-ring structures such as dibenzoaza-crowns.

The “cyclophane” or “phane” nomenclature is useful for naming multi-ring macrocycles. A cyclophane is generally considered to include an aromatic nucleus (benzene or arene) and an aliphatic bridge. The bridge extends between two bridehead atoms in the ring. In naming cyclophane-like compounds, the generic heading “cyclophane” is replaced by the designation “phane,” which denotes all bridged aromatics (including condensed and heteroaromatics such as naphthalene and pyridine). In cyclophane, the prefix “cyclo” thus stands for the benzene ring. A first subdivision of the “phanes” is into cyclophanes, heterophanes and heteraphanes. Heterophanes contain hetero atoms in the aromatic ring, while heteraphanes include hetero atoms in the bridge. The length of the bridges in the phane (the number of atoms between two aromatic points, i.e. bridgehead atoms) is placed in order of decreasing length within square brackets preceding the name with the syllable “phane” serving as the suffix. The position of the bridges can be designated by ortho, meta, para or with numbers in parentheses that are placed after the square brackets. In addition to aromatic and heterocyclic rings, alicyclic rings can also be included in the “phanes.” Such phanes are named as aliphanes, e.g. hexanophane, adamantanophanes, cubanophane or steroidophanes.

Cyclophane chemistry is described in Cyclophane Chemistry, Synthesis, Structures and Reactions, Fritz Vogtle, John Wiley & Sons, New York, N.Y., 1993. Macrocyclic chemistry is described in Macrocyclic Chemistry, Aspects of Organic and Inorganic Supramolecular Chemistry, B. Dietrich, P. Viout and J.-M. Lehm, VCH, New York, N.Y., 1993. Aza-crown chemistry is described in Aza-Crown Macrocycles, J. S. Bradshaw, K. E. Krakowiak and R. M. Izatt, John Wiley & Sons, New York, N.Y., 1993. The contents of each of these volumes is herein incorporated by reference.

Compounds of the invention are macrocyclic compounds that contain nitrogenous moieties therein that are derivatized with “chemical functional groups.” Each of the macrocyclic compounds includes a plurality of such nitrogenous moieties (or nitrogenous sites). Each nitrogenous moiety can be derivatized with one of a variety of chemical functional groups. Libraries of such compounds having various permutations and combinations of chemical functional groups and nitrogenous sites can be prepared and used in standard biological assays such as standard antibiotic assays.

As used in this specification, a “chemical functional” group is one that, when attached to a parent molecule, imparts to that molecule a particular and unique characteristic. It contributes diversity to the parent molecule by rendering the parent molecule different in some way from what it was before attachment of the group. Several chemical functional groups can be attached to a particular molecule and when considered together, the sum total of their properties will impart global diversity characteristics to the parent molecule. Each set of combinations of chemical functional groups on a particular molecule will modify the parent such that the parent molecule having each particular combinations of groups will be different from the parent molecule having any of the other combinations of groups. When all of the combinations of the groups on the parent are considered, a library of compounds will be formed that include all of the possible combinations of groups.

Macrocyclic compounds of the invention can be synthesized with both the position and the choice of the chemical functional groups predetermined, or allowed to be selected by combinatorial selection. In the context of this invention, “combinatorial” does not mean arbitrary, haphazard or indiscriminate. In the context of this invention, “combinatorial” is construed to mean that within the totality of the population of macrocyclic molecules that can be formed using a particular set of chemical functional groups and a particular location of nitrogenous moiety sites within the macrocyclic molecule, there will be sub-populations of each of the possible species. Thus, each of the different combinations of a) choice of chemical functional group and b) positioning of the chemical functional groups will be represented.

“Combinatorial” is distinct from “random.” To illustrate the distinction, if all or nearly all possible combinations are present in the total molecular population, then it is a combinatorial population of molecules. If, however, only one or a small number of molecules from that total population is selected, then the selected molecule or molecules might be randomly selected if it is picked at whim or will from the total population. When the totality of the population is considered, all species are present and it is not a random population. If a systematic selection was made until the totality of the population was exhausted, then all of the species would eventually be selected, however, the order of selection might be random. Thus, in certain preferred embodiments, a pre-ordered selection and/or location of chemical functional groups will be present. In further preferred embodiments, a combinatorialized population of all possible combinations and ordering of the chemical functional groups is present. In even further preferred embodiments, the sequence is modulated between fixed and combinatorial. This is especially useful, as for example, in certain deconvolution strategies.

“Deconvolution” is construed to mean taking the totality of a population and systematically working through that population to establish the identity of a particular member, selected members, or all members of the population. In deconvoluting a combinatorial library of compounds, systematic selection is practiced until an individual compound or a group of individual compounds having a particular characteristic, as for instance being an active species in a specific functional assay, is identified.

The macrocyclic compounds of the invention are prepared by modification of nitrogenous moieties by reaction with reactant compounds for introduction or addition of chemical functional groups on the nitrogenous sites. The reactant compounds are compounds that have both a functionalized site thereon that is capable of reaction with a nitrogen atom of a nitrogenous moiety as well as a further functional group thereon that serves to impart diversity to the reactant compound and to any molecule to which it might be covalently bonded. Reaction between the reactant compounds and the macrocycle connects the reactant compound to the nitrogen atom at a nitrogenous site on the macrocycle.

The nitrogenous moieties can be one of various moieties that include a nitrogen atom as an integral part of the moiety. The chemical functional group is covalently bonded to the nitrogen atom of the nitrogenous moiety to introduce a point of functionality or point of diversity at that particular nitrogen atom. Alternatively a particular nitrogenous moiety might include a “null” in place of the functional group, i.e. absence of a functional group. This is accomplished by having a hydrogen atom covalently bonded to the nitrogen atom or by having a double bond between the nitrogen atom and an adjacent atom, e.g. as an oxime or imine. Certain of the nitrogenous moieties are better for imparting a certain structure to the bridge as opposed to serving as a platform for adding chemical functional groups thereto. Included in this group are carbamates, ureas, sufonamides, sulfinamides and sulfanamides. When the presence of these nitrogenous species is desired for structural purposes as opposed to locations for chemical functional group placement, they can be left in a “null” state.

Preferred macrocyclic compounds of the invention include a ring or a ring system and a bridge that connects between “bridgehead atoms” located in the ring or ring system. Such compounds are either cyclophanes or are cyclophane-like structures. The ring or ring system can be an aromatic ring or ring system, a heterocyclic ring or ring system, an alicyclic ring or ring system, or a mixed ring system such as an araliphatic ring system. The bridge includes at least two of the nitrogenous moieties therein, preferably, three of such sites.

In preferred embodiments of the invention, the bridge is non-symmetrical. This can be achieved either by differences in length of spacer carbon or carbon-hetero atoms located in the bridge between the nitrogenous moieties, or by difference between the nitrogenous moieties, or by both of these parameters. Thus, in certain of the macrocyclic compounds of the invention, it is preferred that at least two of the nitrogenous moieties are different from one another, e.g. including both an amine and a hydroxylamine nitrogenous moiety within the bridge.

The nitrogen atom of at least some of the nitrogenous moieties is included in the bridge backbone. Thus, if an amine is selected as a nitrogenous species in the bridge, it is present as a secondary amine or imine before addition of a chemical functional group. Upon covalent bonding of the chemical functional group to it, it then exist as a tertiary amine. This tertiary amine has a single bond to the left side of the bridge, a single bond to the right side of the bridge and a single bond to the chemical functional group.

Further nitrogenous moieties can reside in the ring or ring system or can be appended to the ring or ring system on a pendant group that is independent of the bridge. Nitrogenous species pendant to the ring or ring system, preferably, are located distal to the attachment of the pendant group to the ring or ring system. Thus utilizing an alkane group to serve as a pendant extender or tether, the nitrogenous moiety would be located at or near one end of such alkane while the alkane in turn would be covalently bonded to the ring or ring system at its other end.

Nitrogenous moieties residing in the ring or ring system include nitrogen atoms of heterocyclic rings that are members of the ring. In certain preferred embodiments of the invention, one or more of the ring nitrogens in an aromatic nitrogen heterocycle, e.g. pyridine, acridine or pyrimidine, or in a non-aromatic nitrogen heterocycle, e.g. piperidine, can be derivatized with chemical functional groups, while in other preferred embodiments, no chemical functional groups are included on the ring nitrogens of the heterocycle.

In some preferred embodiments of compounds of the invention there will be from 2 to about 10 such nitrogenous moieties. In still other preferred compounds of the invention, there will be from 2 to 6 such nitrogenous moieties. A more preferred range is from 2 to 4 of such nitrogenous moieties. An even more preferred range is from 3 to 4 nitrogenous moieties.

Preferred nitrogenous moieties are, in either orientation, amine [—N(X)H—], hydroxylamine [—O—N(X)—], hydrazine [—NH—N(X)—], amides [—C(O)—N(X)—], hydrazides [—C(O)—NH—N(X)—] carbamates [—O—C(O)—N(X)—], ureas [—NH—C(O)—N(X)—], sulfonamide [—SO₂—N(X)—], sulfinamide [—SO—N(X)—] and sulfanamide [—S—N(X)—] moieties where the (X) group of the structures indicate a chemical functional group that is covalently bonded to the nitrogenous moiety.

Illustrative carbon rings for the macrocyclic compound of the inventions include, but are not limited to, benzene, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, transcyclooctane, cyclooctyne, cyclohepta-1,3-diene, [10]annulene (cyclodecapentaene), and [9]annulene (cyclonona-1,3,5,7-tetraene).

Illustrative monocyclic nitrogen heterocycles include, but are not limited to, cyanuric acid, aziridine, azetine 1,3-diazetidine, cyclopentaazane, pyrrole, pyrazole, imidazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,3-triazine, 1,2,4-triazine, cyanuric acid, pyridine, pyridazine, piperidine, pyrrolidine, pyrimidine, pyrazine, piperazine, pyridazine, s-triazine, azepine, 1,2,4-triazepine, and azocine. Illustrative oxygen heterocycles include, but are not limited to, furan, 1,4-pyran, 1,2-dioxane, 1,3-dioxane, oxepin, 1,3,5,7-tetraoxocane and 1,4,8,11-tetraoxacyclotetradecane. Illustrative sulfur heterocycles include, but are not limited to thiophene, thiepine, 1,4-thiazepine. Illustrative mixed heterocycles include, but are not limited to, 1,2,3-oxathiole, isoxazole, oxazole, thiazole, isothiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3,4-oxatriazole, 1,2,3,5-oxatriazole, 1,2,4-oxazine, 1,3,2-oxazine, 1,3,6-oxazine, 1,2,6-oxazine, 1,4-oxazine o-isoxazine, p-isoxazine, 1,2,5-oxathiazine, 1,2,6-oxthazine, 1,4,2-oxadiazine, 1,3,5,2-oxadiazine, 1,4-thiazepine and morpholine.

For the purposes of this invention a ring system is defined to include two or more single rings that join together to form an extended or condensed ring. Such ring systems include extended aromatic systems, alicyclic systems, araalicyclic systems, bicyclic systems and even spiro systems. Examples include aromatic, alicyclic and mixed aromatic-alicyclic (araalicyclic) multiple ring systems, spiro systems, bicyclic systems, non-aromatic multiple ring systems such as adamantane, decalin, steroids and terpenes, including sesquiterpenes, diterpenes, triterpenes and tetraterpenes, and multiple ring heterocyclic systems. Illustrative carbon ring systems include, but are not limited to, naphthalene, tetrahydronaphthalene (tetralin), anthracene, phenanthrene, fluorene, pyrene, coronene, azulene, cluorene, benzonaphthene, benzo[8]annulene, pentalene, heptalane, octalene, indene, isoindene biphenyl, biphenylene and triphenylene condensed rings; spiropentane, spiro[2.4]heptane, spiro[4.5]decane, spiro[3.4]octane, dispiro[5.1.7.2]heptadecane spiro systems; bornane, norbornane, camphor, bicyclo[2.2.1]heptane, bicyclo[3.2.1]octane, 7-methylbicyclo[2.2.1]heptane and trans and cis-bicyclo[4.4.0]decane (trans and cis-decalin) bicyclic systems; carotenes, delta-3-carene, alpha-pinene, camphor, ascaridole, azulene, cadinene, beta-selinene, ambrein, beta-amyrin and lupeol terpenes; cholesterol, lanosterol, coprostanol, stigmasterol, ergosterol, calciferol, cholic acid, deoxycholic acid, estrone, estradiol, estratriol, progesterone, stilbestrol, testosterone, androsterone, deoxycorticosterone, cortisone and 17-hydroxycorticosterone steroids.

Illustrative multiple ring heterocyclic systems include, but are not limited to, carbazole, acridine, xanthene, purine, 1,4-benzisoxazine,, 1,2-benzisoxazine, 3,1,4-benzoxazine, 2,3,1-benzoxazine, 1,4,2-benzoxazine, 1,3,2-benzoxazine, pyrido[4,3-b]pyridine, pyrido[3,2-b]pyridine, pyrido[3,4-b]pyridine, naphthyridine, quinazoline, cinnoline, isoquinoline, quinoline, 1,2-benzoyran, anthranil, benzoxazole, indoxazine, indolazine, pyrano[3,4-b]pyrrole, 1,5-pyrindine, 2-isobenzole, indolenine, indole, isthionaphthene, thionaphthene, isobenzofuran, benzofuran, and 2,2′-bipyridine.

Preferred rings and ring systems include aziridine, azetine, pyridine, 1,3,5-triazine, a-triazine (or as-triazine,) cyanuric acid, pyrrole, pyrazole, 1,2,3-triazole, imidazole, pyrimidine, purine, piperidine, pyrazole, pyrrolidine, piperazine, pyrazine, pyridazine, morpholine, oxazole, isoxazole, thiazole, isothiazole, furan, pyran, thiophene, benzene, naphthalene, anthracene, cyclohexane, cyclopentane and adamantane.

Within the bridge portion of the macrocyclic compounds of the invention, the nitrogenous moieties are connected by “spacer” moieties. Thus, each bridge can be viewed as including spacer moieties that connect between adjacent nitrogenous moieties. Together, the spacer moieties and the nitrogenous moieties are covalently bonded to form the backbone of the bridge. The spacer moieties are, in essence, bifunctional in nature and alternate with the nitrogenous moieties to form a bridge having a plurality of diversity groups projecting therefrom. Preferred spacer groups include [CH₂]_(x) where x is 1-5. Other preferred spacers include such methylene chains interrupted by one or more oxygen or sulfur atoms to form ethers and thioether spacers. Still further spacers include alicyclic and aromatic rings that are bifunctional and thus can be inserted into and connected with the remainder of the backbone of the bridge.

The nitrogen atoms of the nitrogenous moieties within the bridge, besides being linked together by the spacer groups, serve also as the primary site for connecting chemical functional groups that impart “diversity” properties to the compounds of the invention. By varying these chemical functional groups, diversity is incorporated into the compounds of the invention. Except when they are located on the ends of pendant groups on the ring or ring system, or when they carry a “null” group thereon, the nitrogen atoms of the nitrogenous moieties are trivalent in nature, i.e. they are connected to at least two atoms within the bridge (one on either side) and to one chemical functional group that contributes diversity to the molecules.

The chemical functional groups appended to the nitrogenous moieties of the compounds of the invention can be of various structures that impart particular interactive properties to the macrocyclic compounds. These chemical functional groups can effect interactions of at least the following types: hydrogen-bond donors and acceptors, ionic, polar, hydrophobic, aromatic, electron donors and acceptors, pi bond stacking or metal binding. As a result of such interactions, the macrocyclic compounds of the inventions have unique properties effecting the overall global shape, the conformational space, electron density, dipole moment and ability of the compound to interact with enzyme pockets and other binding sites and other similar properties. While we do not wish to be bound by theory, placement of the chemical functional groups on the macrocycle platform “geometrically constrains” the molecules for better binding characteristics with target molecules.

The chemical functional groups can also be referred to as functional groups or as “letters.” The use of such terminology reflects the fact that the different functional groups on the compounds of the invention are positioned in sequences (either predetermined or by random selection) much like letters of the alphabet, hence the term “letter.” These letters can be “reactive” or “non-reactive.” By “reactive,” it is meant that they will interact with a target molecule in some manner (that need not but can be predefined). By non-reactive,” it is meant that they are not designed to primarily interact with a target molecule, and in fact while they may interact with the target molecule, the primary purpose of the non-reactive moieties are to impart other properties to the molecule such as, but not necessarily limited to, effecting up-take, distribution, metabolism or identification.

A first preferred group of chemical functional groups according to the invention include H, C₂-C₁₀ alkyl or substituted alkyl, C₂-C₁₀ alkenyl or substituted alkenyl, C₂-C₁₀ alkynyl or substituted alkynyl, C₄-C₇ carbocyclic alkyl, alkenyl or alkynyl or substituted carbocyclic, or C₆-C₁₄ aryl or substituted aryl where the substituent groups are selected from hydroxyl, amino, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl, or alkynyl groups; an ether having 2 to 10 carbon atoms and 1 to 4 oxygen or sulfur atoms; a nitrogen, sulfur or oxygen containing heterocycle; a metal coordination group; a conjugate group; halogen; hydroxyl (OH); thiol (SH); keto (C═O); carboxyl (COOH); amide (CONR); amidine (C(═NH)NRR); guanidine (NHC(═NH)NRR); glutamyl CH(NRR)(C(═O)OR); nitrate (ONO₂) ; nitro (NO₂) ; nitrile (CN) ; trifluoromethyl (CF₃) ; trifluoromethoxy (OCF₃); O-alkyl; S-alkyl; NH-alkyl; N-dialkyl; O-aralkyl; S-aralkyl; NH-aralkyl; amino (NH₂); azido (N₃); hydrazino (NHNH₂); hydroxylamino (ONH₂); sulfoxide (SO); sulfone (SO₂); sulfide (S—) ; disulfide (S—S) ; silyl; a nucleosidic base; an amino acid side chain; a carbohydrate; a drug; or group capable of hydrogen bonding.

Heterocycles, including nitrogen heterocycles, suitable for use as functional groups include, but are not limited to, imidazole, pyrrole, pyrazole, indole, 1H-indazole, α-carboline, carbazole, phenothiazine, phenoxazine, tetrazole, triazole, pyrrolidine, piperidine, piperazine and morpholine groups. A more preferred group of nitrogen heterocycles includes imidazole, pyrrole, and carbazole groups. Imidazole groups are especially preferred.

Purines and pyrimidines suitable for use as functional groups include adenine, guanine, cytosine, uridine, and thymine, as well as other synthetic and natural nucleobases such as xanthine, hypoxanthine, 2-aminoadenine, 6-methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 5-halo uracil and cytosine, 6-azo uracil, cytosine and thymine, 5-uracil (pseudo uracil), 4-thiouracil, 8-halo, amino, thiol, thioalkyl, hydroxyl and other 8-substituted adenines and guanines, 5-trifluoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine. Further purines and pyrimidines include those disclosed in U.S. Pat. No. 3,687,808, those disclosed in the Concise Encyclopedia Of Polymer Science And Engineering, pages 858-859, Kroschwitz, J. I., ed. John Wiley & Sons, 1990, and those disclosed by Englisch et al., Angewandte Chemie, International Edition 1991, 30, 613.

In the context of this specification, alkyl (generally C₁-C₂₀), alkenyl (generally C₂-C₂₀), and alkynyl (generally C₂-C₂₀) groups include but are not limited to substituted and unsubstituted straight chain, branch chain, and alicyclic hydrocarbons, including methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl and other higher carbon alkyl groups. Further examples include 2-methylpropyl, 2-methyl-4-ethylbutyl, 2,4-diethylbutyl, 3-propylbutyl, 2,8-dibutyldecyl, 6,6-dimethyloctyl, 6-propyl-6-butyloctyl, 2-methylbutyl, 2-methylpentyl, 3-methylpentyl, 2-ethylhexyl and other branched chain groups, allyl, crotyl, propargyl, 2-pentenyl and other unsaturated groups containing a pi bond, cyclohexane, cyclopentane, adamantane as well as other alicyclic groups, 3-penten-2-one, 3-methyl-2-butanol, 2-cyanooctyl, 3-methoxy-4-heptanal, 3-nitrobutyl, 4-isopropoxydodecyl, 4-azido-2-nitrodecyl, 5-mercaptononyl, 4-amino-1-pentenyl as well as other substituted groups.

Further, in the context of this invention, a straight chain compound means an open chain compound, such as an aliphatic compound, including alkyl, alkenyl, or alkynyl compounds; lower alkyl, alkenyl, or alkynyl as used herein include but are not limited to hydrocarbyl compounds from about 1 to about 6 carbon atoms. A branched compound, as used herein, comprises a straight chain compound, such as an alkyl, alkenyl, alkynyl compound, which has further straight or branched chains attached to the carbon atoms of the straight chain. A cyclic compound, as used herein, refers to closed chain compounds, i.e. a ring of carbon atoms, such as an alicyclic or aromatic compound. The straight, branched, or cyclic compounds may be internally interrupted, as in alkoxy or heterocyclic compounds. In the context of this invention, internally interrupted means that the carbon chains may be interrupted with heteroatoms such as O, N, or S. However, if desired, the carbon chain may have no heteroatoms.

Further in the context of this specification aryl groups (generally C₆-C₂₀) include but are not limited to substituted and unsubstituted aromatic hydrocarbyl groups. Aralkyl groups (generally C₇-C₂₀) include but are not limited to groups having both aryl and alkyl functionalities, such as benzyl and xylyl groups. Preferred aryl and aralkyl groups include, but are not, limited to, phenyl, benzyl, xylyl, naphthyl, tolyl, pyrenyl, anthracyl, azulyl, phenethyl, cinnamyl, benzhydryl, and mesityl. These can be substituted or unsubstituted. It is particularly preferred that if substituted, the substitution be meta to the point of attachment of the substitution aryl or aralkyl compound to the nitrogenous moieties or to tethers connecting to the nitrogenous moieties since such meta substitution isolates electronic effects of the substituent from the reactive functionality used to attach the aromatic moiety to the nitrogenous moiety or a tether.

The aliphatic and aromatic groups as noted above may be substituted or unsubstituted. In the context of this invention, substituted or unsubstituted, means that the compounds may have any one of a variety of substituents, in replacement, for example, of one or more hydrogen atoms in the compound, or may have no substituents. Typical substituents for substitution include, but are not limited to, hydroxyl, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, or alkyl, aryl, alkenyl, or alkynyl groups.

Metal coordination groups according to the invention include, but are not limited to, carbonyl moieties, hyroxyl moieties, amine moieties, acid moieties and other more complex moieties such as hydroxamic acids, catecholamide, acetylacetone, 2,2′-bipyridine, 1,10-phenanthroline, diacetic acid, pyridine-2-carboxamide, isoalkyldiamine, thiocarbamate, oxalate, glycyl, histidyl and terpyridyl. Other metal coordination groups are also known (Mellor, D. P., Chemistry of Chelation and Chelating Agents in International Encyclopedia of Pharmacology and Therapeutics, Section 70, The Chelation of Heavy Metals, Levine, W. G. Ed., Pergamon Press, Elmford, N.Y., 1979).

Non-reactive functionalities used as chemical functional groups, such as groups that enhance pharmacodynamic properties, include groups that improve uptake and enhance resistance to enzymatic or chemical degradation. Non-reactive functionalities may also enhance pharmacokinetic properties. In the context of this invention, such groups improve uptake, distribution, metabolism or excretion. Non-reactive functionalities include, but are not limited to, alkyl chains, polyamines, ethylene glycols, steroids, polyamides, aminoalkyl chains, amphipathic moieties, and conjugate groups attached to any of the nitrogenous sites for attachment, as described above. Conjugate groups of the invention include intercalators, reporter molecules, polyamines, polyamides, poly ethers including polyethylene glycols, and other moieties known in the art for enhancing the pharmacodynamic properties or the pharmacokinetic properties. Typical conjugate groups include PEG groups, cholesterols, phospholipids, biotin, phenanthroline, phenazine, phenanthridine, anthraquinone, acridine, fluoresceins, rhodamines, coumarins, and dyes.

A number of chemical functional groups can be introduced into compounds of the invention in a blocked form and subsequently deblocked to form a final, desired compound. In general, a blocking group renders a chemical functionality of a molecule inert to specific reaction conditions and can later be removed from such functionality in a molecule without substantially damaging the remainder of the molecule (Green and Wuts, Protective Groups in Organic Synthesis, 2d edition, John Wiley & Sons, New York, 1991). For example, amino groups can be blocked as phthalimido groups, as 9-fluorenylmethoxycarbonyl (FMOC) groups, and with triphenylmethylsulfenyl, t-BOC or benzyl groups. Carboxyl groups can be protected as acetyl groups. Representative hydroxyl protecting groups are described by Beaucage et al., Tetrahedron 1992, 48, 2223. Preferred hydroxyl protecting groups are acid-labile, such as the trityl, monomethoxytrityl, dimethoxytrityl, trimethoxytrityl, 9-phenylxanthine-9-yl (Pixyl) and 9-(p-methoxyphenyl)xanthine-9-yl (MOX). Chemical functional groups can also be “blocked” by including them in a precursor form. Thus, an azido group can be used considered as a “blocked” form of an amine since the azido group is easily converted to the amine.

Solid supports according to the invention include controlled pore glass (CPG), oxalyl-controlled pore glass (Alul et al., Nucleic Acids Research 1991, 19, 1527), TentaGel Support, which is an aminopolyethyleneglycol derivatized support (Wright et al., Tetrahedron Letters 1993, 34, 3373) or Poros which is a copolymer of polystyrene/divinylbenzene.

A further advantage of this invention is the ability to synthesize macrocyclic compounds that, in addition to or in place of variability in the sequences of the diversity groups, have an asymmetric sequence of spacer units. Stated otherwise, the spacer units can also vary within the macrocyclic structure. This is easily accomplished by using different compounds that eventually become incorporated as spacer units.

One preferred method of synthesizing the compounds of the invention is via solution phase synthesis. A further preferred method of synthesizing the compounds of the invention is via solid phase synthesis.

The chemical functional groups, i.e. groups that give individual characteristics to individual molecules, are attached to their respective monomeric units via the nitrogen atoms of the nitrogenous moieties. These chemical functional groups thus provide diverse properties or diversity to the resulting macrocyclic compounds. Such diversity properties include hydrogen-bond donors and acceptors, ionic moieties, polar moieties, hydrophobic moieties, aromatic centers, electron-donors and acceptors, pi bond stacking and metal binding. Together, the properties of the individual repeating units contribute to the uniqueness of the macrocycles in which they are found. Thus, a library of such macrocycles would have a myriad of properties, i.e. diversity. Collectively, the properties of the chemical functional groups on any one macrocycle contribute to the uniqueness of that macrocycle and impart certain characteristics thereto for interaction with proteins, lipids, or nucleic acids, or for cellular or enzymatic interactions with a target molecule. The macrocycle may also possess herbicidal or insecticidal properties.

As noted above, the macrocyclic compounds of the invention can be prepared having either preselected sequences or sequences determined via combinatorialization strategies. One useful combinatorial strategy is a “fix last” strategy noted in certain of the examples below. A further useful combinatorial strategy is the above-noted SURF™ strategy, which is disclosed and claimed in U.S. patent application Ser. No. 749,000, filed Aug. 23, 1991, and PCT Application US92/07121, filed Aug. 21, 1992, both of which are commonly assigned with this application. The entire disclosure of these applications are herein incorporated by reference.

Illustrative of the SURF™ strategy is a 2′-O-methyl oligonucleotide library (Ecker et. al., ibid.) shown in Table I below. Table I describes the selection of a 2′-O-methyl oligonucleotide for binding to an RNA hairpin. The K_(D)s, i.e. the binding constants, were determined by gel shift. “X” is used to indicate the position being varied and underlining is used to indicate positions that become fixed during successive iterations of the SURF™ strategy.

TABLE I K_(D) (mM) Subsets X = A X = C X = G X = T Round 1   22 10  >100  >100 NNNNXNNNN Round 2 >10  4 >10 >10 NNNNCNXNN Round 3 >10 0.5  >10 >10 NNXNCNCNN Round 4 >10 0.15 >10 >10 NNCXCNCNN Round 5 0.08 >1   0.4  >1  NNCCCXCNN Round 6 0.05 >0.5 0.08  >0.5 NNCCCACXN Round 7  >0.1 >0.1 0.03  >0.1 NXCCCACAN Round 8 0.05 0.02 0.05 0.04 NGCCCACAX Round 9 0.03 0.05 0.02 0.01 XGCCCACAC

This SURF™ strategy has not been previously used for libraries except those that employ naturally-occurring nucleotide monomer units, as phosphodiesters or phosphorothioates. Other combinatorial strategies have been previously used only for libraries that employ amino acids as monomeric units.

One advantage of the present invention is that the simple design of a macrocyclic platform having multiple sites for diversity enables combining rational drug design with screening mechanisms for thousands of compounds. This is achieved by using the compounds of the invention in combinatorial techniques such as the SURF™ strategy or the “fix last” strategy described in this specification.

The macrocyclic compounds of the invention can be used in diagnostics, therapeutics and as research reagents and kits. They can be used in pharmaceutical compositions by including a suitable pharmaceutically acceptable diluent or carrier. In preferred embodiments, the compounds of the invention act as inhibitors of enzymes such as phospholipase A₂; as inhibitors of pathogens such as virus, mycobacterium, bacteria (gram negative and gram positive), protozoa and parasites; as inhibitors of ligand-receptor interactions such as PDGF (platelet derived growth factor), LTB₄ (leukotriene B₄), IL-6 and complement C5_(A); as inhibitors of protein/protein interactions including transcription factors such as p50 (NFκB protein) and fos/jun; for the inhibition of cell-based interactions including ICAM induction (using inducers such as IL1-β, TNF and LPS) and as herbicides and insecticides. In other preferred embodiments, the compounds of the invention are used as diagnostic reagents for each of the above noted biological entities, and as reagents in assays and as probes. In other preferred embodiments, the compounds of the invention are used to chelate heavy metals and as imaging agents.

The compounds of the invention generally are prepared by coupling preselected bifunctional synthons under conditions effective to form the compounds. In certain embodiments, compounds of the invention are prepared by intermolecular reductive coupling. In other embodiments, compounds of the invention can be prepared by intermolecular radical addition reactions. In further embodiments, compounds can be prepared by nucleophilic displacement. In each of these embodiments, nitrogen atoms in the resulting linkage can be further functionalized. For example, the nitrogen atoms of the nitrogenous moieties can be reacted with a group having structure R_(L)—T—L, thereby displacing the R_(L) leaving group and forming a covalent —N—T—L linkage where T—L represents a chemical functional group or a tethered chemical functional group.

Amino nitrogenous compounds, if not directly available, can be synthesized by treating the corresponding hydroxyl-terminated compound with Ph₃P, CBr₄ and LiN₃ according to the procedure of Hata et al. (J. Chem. Soc. Perkin 1 1980, 306) to furnish a terminal azide. Reduction of the azido group with tributyltin hydride provides the desired amino functionality.

Hydroxylamino nitrogenous groups can be prepared by treating the corresponding hydroxyl compound with N-hydroxyphthalimide, triphenylphosphine and diethylazodicarboxylate under Mitsunobu conditions to provide an O-phthalimido derivative. The free hydroxylamino compound can be generated in quantitative yield by hydrazinolysis of the O-phthalimido derivative.

Hydrazino nitrogenous compounds can be prepared by treating hydroxyl-terminated compounds with tosyl chloride in pyridine to give an O-tosylate derivative. Treatment of benzylcabazide with O-tosylate will furnish a benzylcarbazide derivative, which on hydrogenation provides the free hydrazino moiety for reductive coupling.

The hydrazino nitrogenous compound (hydrazine) synthesized as described above can be further converted to a hydrazide by reacting it with a carboxylic ester, or an acid halide in the presence of a base such as pyridine or DIEA.

Amino nitrogenous compounds (amines) may be further functionalized to form amides, hydrazides, carbamates, ureas, sulfonamides, sulfinamides and sulfanamides. An amide nitrogenous compound can be prepared by treating the amine with an acid halide, such as an acid chloride, in the presence of a base such as pyridine. Alternatively, amides can also be prepared by the action of an amine on a carboxylic ester.

Carbamates can also be synthesized from amines. The procedure involves reaction of the amine with an alkyl halide and potassium carbonate in the presence of a phase transfer catalyst such as BU₄NH⁺ HSO₄ ⁻. Carbamates can also be obtained by the treatment of an amine with an appropriate alkyl or aryl chloroformate, or by reacting an amine with carbon monoxide, oxygen and an alcohol, in the presence of a catalyst such as pyridine.

Further, amines can be converted to ureas by reacting the amine with carbon monoxide in the presence of selenium or sulfur, or Pd(OAc)₂—I₂—K₂CO₃ (only for secondary amines). Also, amines can be added to isocyanates to form ureas. Symmetrically substituted ureas can be obtained by the reaction of an amine with phosgene or ethyl carbonate.

Sulfonamides can be prepared from amines by the reaction of an amine with a sulfonyl chloride in the presence of a base. Sulfinamides can be prepared by the reaction of an amine with a sulfinyl chloride in the presence of a base. The sulfonamide or sulfinamide thus formed can further be reduced to a sulfanamide by LiAlH₄, zinc and acetic acid or triphenylphosphine and iodine.

The nitrogen atoms of nitrogenous compounds such as amines, hydroxylamines, hydrazines, amides, carbamates, ureas, sulfonamides, sulfinamides and sulfanamides can be alkylated by treating the nitrogenous compound with a base such as sodium hydroxide or sodium hydride, and then reacting the resulting sodium salt with a halide such as the illustrative halides (benzyl bromide, 3-methylbenzyl bromide, 3-methoxybenzyl bromide or 3-nitrobenzyl bromide) used in the examples below. A wide spectrum of halides can be used for this purpose.

The above-mentioned nitrogenous compounds can also be acylated at the nitrogen atom by treating them with a base such as sodium hydroxide or sodium hydride, and then reacting the resultant sodium salt of the nitrogenous compound with an acid halide. Illustrative acid halides include, but are not limited to, benzoyl chloride, 3-methylbenzoyl chloride, 3-methoxybenzoyl chloride or 3-nitrobenzoyl chloride.

Additionally, the nitrogenous compounds can be functionalized at the nitrogen atom by reaction of the nitrogenous compound with an aldehyde or ketone forming a Schiff base. The Schiff base is then reduced in the presence of a reducing agent such as NaCNBH₃, sodium metal in ethanol, or organometallic compounds such as allylic boranes and allylic stannanes.

A general synthetic scheme for synthesis of illustrative compounds of the invention is shown in FIG. 1. Exemplified in this figure is the synthesis of a “hetera-heterophane” (a phane having a heterocyclic ring as well as hetero atoms in the bridge). This compound has three nitrogenous moieties in the bridge and a fourth nitrogenous moiety pendant to the heterocyclic ring. As illustrated in FIG. 1, a triazine was selected as the ring compound of the “phane” macrocycle. The bridge of the phane includes two nitrogenous amine moieties and one nitrogenous hydroxylamine moiety. A further nitrogenous amine moiety is included on a pendant group on the triazine ring.

Aside from having mixed nitrogenous moieties in the bridge, the bridge is also asymmetrical by virtue of the use of spacers of different lengths. The nitrogenous moieties are numbered 1 to 4 in FIG. 1. There is a propyl chain between positions 1 and 3, an ethyl chain between positions 2 and 3 and methyl chains between positions 1 and one of the bridgehead atoms of the ring and position 2 and the other of the bridgehead atoms of the ring.

In examples 32 to 44 of the Examples the preparation of various ring structures is shown. This rings can be included in macrocyclic compounds of the invention by cyclizing them in the same manner as is described in Example 48. Compound 6 can be used as the bridge portion of the macrocycle during these cyclizations. Thus compounds having a macrocyclic structure as is illustrated by compound 10 in FIG. 1 will be obtained. A further intermediate for forming the bridge portion of macrocyclic compounds of the invention is described in Example 74. This bridge intermediate, and other bridge intermediates of similar structure, can be joined with other rings systems to form further compounds of the invention. These macrocycles will be functionalized at the nitrogen atoms of their nitrogenous species as is described in Examples 57-61.

The synthesis and deconvolution of a library of macrocyclic compounds of the invention is illustrated in FIGS. 2-5. A macrocyclic compound, as for example as synthesized in FIG. 1, is treated as per the procedures illustrated in FIGS. 2-5 for combinatorialization of its nitrogenous sites. In the illustrative example, the macrocycle has four nitrogenous sites that can be combinatorialized. In combinatorializing these four sites, any number of a vast selection of chemical functional reactant species can be reacted with the nitrogenous site to place chemical functional groups thereon.

The overall extent of diversification will be a factor of both the number of sites and the number of reactant species presented to each site for covalent bonding to the site. To achieve a library having limited diversification, only a few sites or chemical functional groups need be used. To achieve a high degree of diversification, one or the other, or both the number of sites and the number of chemical functional groups is expanded. The complexity of the library is represented by the number of chemical functional groups taken to the power represented by the number of sites these chemical functional groups can be located at. Thus for example, 5 chemical functional groups at three unique sites will give a library of 125 (5³) compounds, 20 chemical functional groups at 4 sites will give a library of 160,000 (20⁴) compounds and 8 chemical functional groups at 6 sites will give a library of 262,144 (8⁶) compounds. Normally, to obtain a large library of a linear oligomeric compound such as a peptide, the length of the peptide, as for instance a 10-mer, offers a large number of sites. Thus, if all the 20 or so normal amino acid were utilized in making such a peptide library, very complex libraries (in the order of 10¹³ compounds) would result.

In constructing and assaying marcomolecules of the invention, if an enzyme binder or a macromolecule with other like biological property is desired, normally a macromolecule having a smaller number of sites would be selected such that the spatial size (the three dimensional global footprint) of the macromolecule does not exceed a pre-selected size in order to fit into the enzyme pocket or other biological target. If uptake of a molecule is a consideration and it is determined that the molecular weight of the molecule should not exceed a pre-selected molecular weight range, as for instance a molecular weight of 500, 1000 or 1500, then a small number of sites might also be selected. In these instances, the number of sites that can be combinatorialized is maintained relatively small (less than 10, preferably less than 6 and even more preferred from 2 to 4). In order to construct very complex (large) libraries, a greater number of chemical functional groups are used to expand the libraries such that they contain a large number of individual species. As opposed to peptides, where normally only 20 amino acids are available for selection as the chemical functional groups, in diversifying the macromolecules of the invention one is not constrained as far as chemical functional groups are concerned. Any number of chemical functional groups can be selected.

For targets where size of the macromolecule is not an overriding consideration, such as in a metal ion scavenger to be used in an industrial waste stream, macromolecules having a large number of sites can be selected and the number of chemical functional groups decreased. Thus, only those chemical functional groups that are known to be metal coordinating groups might be selected. An expanded diversity would be achieved by selecting the macromolecule bridge and any pendant groups on the ring of the compound of the invention to include sufficient number of sites to ensure a high degree of diversity. Thus, in these instances, the number of nitrogenous moieties included in the molecule would be selected in the high range as for instance from 4 to 10, preferably 6 to 10.

The chemical functional groups can be selected based on chain length, i.e. short versus long, based on the use of a ring versus a linear group, use of an aromatic versus aliphatic group, use of a functionalized group versus a non-functionalized group, to mention only a few of the wide variety of chemical functional groups available. Indeed simply varying functional moieties, e.g. acid, alcohol, aldehyde, amide, amine, amidine, azo, azoxy, double bond, ether, ethylene oxide, guanidine, halide, haloalkyl, hydrazine, hydroxylamine, ketone, mercaptan, nitrate, nitrile, nitro, nitroso, quaternary nitrogen, sulfide, sulfone, sulfoxide, triple bond, urea, etc. on a single backbone, e.g. a simple alkyl group, yields a vast array of diversity functions. When this is expanded to include placement of such varied functional moieties on a broad platform of backbones, e.g. a series of alkyl compounds, a series of aryl compounds, a series of alicyclic compounds, etc., the potential for a vast array of chemical functional groups is apparent. Other chemical functional groups include alkyl, alkenyl, alkynyl, alicyclic and substituted alkyl, alkenyl, alkynyl, alicyclic; aryl and substituted aryl; aralkyl, substituted aralkyl, heterocycles, moieties as found in the α-position of amino acids, nucleobases such as pyrimidines and purines; and metal chelating groups.

Chemical functional groups of the invention can be represented by structure I:

—T—L;  I

where T is a single bond, a methylene group or a group having structure II:

—{[CR¹R²]_(m)—B—[CR¹R²]_(n)—[C(D)]_(p)—E—}_(q)—  II

where:

D is ═O, ═S, ═NR³;

B and E, independently, are a single bond, CH═CH, C≡C, O, S, NR³ , C₆-C₁₄ aryl;

each R¹, R² and R³ are, independently, H, alkyl or haloalkyl having 1 to about 10 carbon atoms; alkenyl having 2 to about 10 carbon atoms; alkynyl having 2 to about 10 carbon atoms; or aryl having 7 to about 14 carbon atoms;

m and n, independently, are zero to 5;

p is zero or 1;

q is 1 to about 10; and

L is, H; C₂-C₁₀ alkyl or substituted alkyl, C₂-C₁₀ alkenyl or substituted alkenyl, C₂-C₁₀ alkynyl or substituted alkynyl, C₄-C₇ carbocyclic alkyl, alkenyl or alkynyl or substituted carbocyclic, or C₆-C₁₄ aryl or substituted aryl where the substituent groups are selected from hydroxyl, amino, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl, or alkynyl groups; an ether having 2 to 10 carbon atoms and 1 to 4 oxygen or sulfur atoms; a nitrogen, sulfur or oxygen containing heterocycle; a metal coordination group; a conjugate group; halogen; hydroxyl (OH); thiol (SH); keto (C═O); carboxyl (COOH); amide (CONR); amidine (C(═NH)NRR); guanidine (NHC(═NH)NRR); glutamyl CH(NRR)(C(═O)OR); nitrate (ONO₂); nitro (NO₂); nitrile (CN); trifluoromethyl (CF₃); trifluoromethoxy (OCF₃); O-alkyl; S-alkyl; NH-alkyl; N-dialkyl; O-aralkyl; S-aralkyl; NH-aralkyl; amino (NH2); azido (N₃); hydrazino (NHNH₂); hydroxylamino (ONH₂); sulfoxide (SO); sulfone (SO₂); sulfide (S—); disulfide (S—S); silyl; a nucleosidic base; an amino acid side chain; a carbohydrate; a drug; or group capable of hydrogen bonding.

To introduce the chemical functional groups on to the nitrogenous moieties, various chemical functional group reactant compounds, i.e. the reactive forms of the chemical functional groups, have a further functional group thereon are used. These further functional groups can include, but are not limited to, OHC—(aldehydes), OR₁C—(ketones) halogen, HO₂C—, and halogen-CO—(acid halide). The “diversity end” of these chemical functional group reactant compounds have other functionalities thereon, as noted above.

Illustrated in FIGS. 2-5 is the combinatorialization of a macromolecule having four nitrogenous sites coupled with four chemical functional groups to achieve an overall complexity of 256 (4⁴) compounds. A “fix last” deconvolution strategy is utilized.

Illustrated in FIG. 2 is the first round, round one, of this “fix last” combinatorial procedure. Four chemical functional groups are utilized. These are labeled L₁ to L₄. When all of the groups are present at any one site (on different molecules of the population), the chemical functional groups are noted as “L₁₋₄”. When but a single chemical functional group is located at a particular site, it is labeled as, for example, L₁. When pools of separate molecules (in reality, pool of a large population of the same molecular species) are identified, the individual pools are labeled as L_(1,2,3,4). In the procedure illustrated in FIG. 2, during the procedure, sites 1, 2 and 3 are combinatorialized, that is any one of the four chemical functional groups can reside on any particular individual molecule (or populations of that molecular species). There is a population of molecules having chemical functional group 1 at site one, chemical functional group 1 at site 2, chemical functional group 1 at site 3; a population having chemical functional group 2 at site 1, chemical functional group 1 at site 2 and chemical functional group 1 at site 3; a population having chemical functional group 3 at site 1, chemical functional group 1 at site 2 and diversity group 1 at site 3; etc. until one reaches a population having chemical functional group 4 at site 1, chemical functional group 4 at site 2 and chemical functional group 3 at site 3; and a population having chemical functional group 4 at site 1, chemical functional group 4 at site 2 and chemical functional group 4 at site 3. Thus, the “etc.” portion of the preceding sentence represents all of the other combinations between the given extremes.

After sites 1, 2 and 3 are combinatorialized, as the last step of the procedure, the totality of the molecules in the library are divided into four groups or pools and each pool is reacted with the reactant form of but a single, known chemical functional group to covalently bond that chemical functional group to site 4. Thus the identity of the chemical functional group at site 4 is known. Each pool will include 64 different molecular species and there will be 4 such pools for a total of 256 total molecular species present in the library.

As illustrated in FIG. 2, the procedure includes as its last step, “fixing” the chemical functional group on the nitrogenous moiety at site 4, the pendant ring site. Stated otherwise, three of the four nitrogenous moieties of the illustrated macrocycle are reacted with appropriate reactant species that carry diversity functions thereon. Prior to reaction of the fourth nitrogenous site, the reaction mixture is divided into the same number of pools as there are chemical functional groups, i.e. four pools in this illustrative example, and maintained as four distinct pools. Each pool is treated with a single known reactant. Thus, the identity of the chemical functional group bonded to the nitrogen atom at site 4 of molecules in each pool is known. The individual pools of compounds of the invention are then screened for an activity of interest.

During round one, in combinatorializing the four sites of the compound, a blocking group is used at sites 3 and 4. The blocking group utilized at site 3 is a “removable” blocking group that simply “masks” the site against reaction with incoming reactant molecules. The blocking group utilized at site 4 is a “precursor-type” blocking group, i.e. it is a functional group that can be modified via a chemical reaction to form a different functional group, such as the desired nitrogenous moiety.

After completion of combinatorializing site 1,2 and 3 and fixing site 4, the pools are assayed. For any pool that shows activity in a specific functional assay, further sites are sequentially fixed and assayed. Thus, as shown in FIG. 3, for the second round, site 3 can be selected as the site to be fixed next. This is effected by combinatorializing sites 1 and 2, as per the same procedure described for round one in FIG. 2. A more facile way to achieve this is to set aside an aliquot of the intermediate library of round one to be later used in the second round. This method can also be used in later rounds, i.e. setting aside aliquots of intermediate mixtures of compounds from earlier rounds. Site 4 is then “deblocked” and reacted with the desired chemical functional group, in its reactive form, that has been identified by assaying the pools of round one. This fixes site 4 with the selected chemical functional group ascertained from round one. The blocking group from site 3 is removed, the totality of the reaction mixture is divided into pools and each pool is treated with a known chemical functional group reactant. The pools are again assayed for desired activity and the most active pool is now ready for further deconvolution.

In round three, illustrated in FIG. 4, the most active chemical functional group at site 1 is now fixed. Again the “fix last” strategy is utilized. Site 1 is blocked. Site 2 is combinatorialized. Site 3 is deblocked and is fixed with the chemical functional group selected from the second round. Site 4 is deblocked and fixed with the chemical functional group selected from the first round screening. Site 1 is deblocked and the reaction mixture divided into four pools. Each separate pool is fixed with one of the chemical functional groups and each pool separately assayed for the desired activity. The most active pool is selected.

The fourth round of deconvolution now fixes site 2. This is effected by fixing site 1 with the chemical functional group selected in round three followed by blocking site 2. Site 3 is deblocked and fixed with the selected chemical functional group selected from round two. Site 4 is deprotected and fixed with the chemical functional group selected from round one. Site 2 is now deblocked, the reaction mixture is divided into pools and each pool is reacted with a different chemical functional group reactant. The resulting pools are individually assayed and the final molecule of interest is ascertained from this final assay. Of the 256 compounds possible in the library, one has now been selected that shows the greatest desired activity in the functional assays effected at the conclusion of each of rounds one, two, three and four.

In the examples below during combinatorialization, for illustrative purposes only, four aromatic chemical functional groups or letters, specifically benzyl, m-methylbenzyl, m-nitrobenzyl, and m-methoxybenzyl moieties, are used. It is to be recognized that this is for illustrative purposes only, and this invention is not to be construed as being limited to only this number of chemical functional groups or to these particular chemical functional groups during a combinatorialization of any particular macrocyclic compound of the invention. The precursor compounds for the illustrated chemical functional groups as well as precursor compounds for multitudes of other such chemical functional groups are commercially available from several commercial sources. Other chemical functional groups, for example alkyl, alkenyl, alkynyl, amino acid side chains, nucleobases and the like, are utilized in the same manner.

In the illustrative examples below, the basic chemistry employs various types of nitrogenous moieties, e.g. primary amine, secondary oxyamine, secondary amine, each of which is protected with a suitable protecting group when necessary. For illustrative purposes, the protective groups selected for protecting these nitrogen atoms are azido (a precursor-type protecting group), tert-butoxycarbonyl, sulfenyltriphenyl and phthaloyl. The tert-butoxycarbonyl (t-Boc) and the sulfenyltriphenyl [S(Ph)₃] moieties can be removed under differential acid conditions, and the phthaloyl moiety can typically be removed with hydrazine (basic conditions), or under certain acid conditions.

EXAMPLE 1 N-t-Boc-2-amino-1-bromoethane

2-bromoethylamine hydrobromide (14.3 g, 70 mmol) was dissolved in CH₃CN (250 mL) and triethyl amine (11 mL, 77 mmol) and di-t-butyl dicarbonate (15.2 mL, 66.5 mmol) was added. The reaction mixture was stirred at room temperature for 12 hours under an atmosphere of argon. Saturated NaHCO₃ (200 mL, aq) was added and stirring was continued for 15 minutes. The mixture was poured into a separatory funnel and extracted several times with ether. The combined ether extracts were dried over Na₂SO₄. The dried ether layer was filtered and concentrated in vacuo to give 15.28 g (97.4%) of the title compound. TLC (Rf: 0.7; 10% MeOH/CH₂Cl₂). ¹H NMR (CDCl₃) δ1.5 (s, 9H, t-butyl CH₃), 3.5 (m, 4H, CH₂), 5.1 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.3 (CH₃), 32.7 (CH₂), 42.3 (CH₂), 79.7 (C(CH₃)₃), 155.5 (CO).

EXAMPLE 2 N-1-t-Boc-(N-2-azido)diaminoethane

N-t-Boc-2-amino-1-bromoethane (15.28 g, 68.2 mmol) was suspended in DMF (200 mL) and sodium azide (5.0 g, 75 mmol) was added. The reaction mixture was stirred at about 80° C. for 12 hours under an atmosphere of argon. The reaction mixture was cooled and diluted with ether (400 mL). The reaction mixture was washed five times with saturated NaCl and dried over Na₂SO₄. The dried ether layer was filtered and concentrated in vacuo to give 9.8 g (77.1%) of the title compound. TLC (Rf: 0.4; 20% EtOAc/Hexane). ¹H NMR (CDCl₃) δ1.4 (s, 9H, t-butyl CH₃), 3.2 (t, 2H, CH₂), 3.3 (m, 2H, CH₂), 4.9 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.2 (CH₃), 40 (CH₂), 51.1 (CH₂), 79.7 (C(CH₃)₃), 155.7 (CO).

EXAMPLE 3 N-t-Boc-diaminoethane (1)

To N-1-t-Boc-(N-2-azido)diaminoethane (9.8 g, 52.6 mmol), in THF (200 mL), was added H₂O (0.8 mL) and triphenyl phosphine (15 g, 58 mmol). The reaction mixture was stirred at about 80° C. for 12 hours under an atmosphere of argon. The reaction mixture was evaporated to a white solid residue. NaH₂PO₄ (200 mL, 0.5 M, aq) was added and the mixture was stirred for about 15 minutes. The mixture was washed with EtOAc. The aqueous layer was separated and made basic with 3 N NaOH. The resulting mixture was extracted with ether and the combined ether extracts dried over Na₂SO₄. The dried ether layer was filtered and concentrated in vacuo to give 8.1 g (96.5%) of the title compound. TLC (Rf: 0.2; 20% MeOH/CH₂Cl₂). ¹H NMR (CDCl₃) δ1.3 (s, 2H, NH₂), 1.4 (s, 9H, t-butyl CH₃), 2.8 (t, 2H, CH₂), 3.2 (m, 2H, CH₂), 4.8 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.4 (CH₃), 41.9 (CH₂), 43.5 (CH₂), 79.2 (C(CH₃)₃), 156.2 (CO).

The title compound was also prepared according to the procedure of Saari, et.al., J. Med. Chem., 1990, 33 97-101.

EXAMPLE 4 1-(Methanesulfonyl)-3-chloropropanol

To a solution of 3-chloro-1-propanol (283 g, 2.99 mol) and triethylamine (629 mL, 4.5 mol) in CH₃CN (3500 mL) at 10 ° C. was added dropwise methanesulfonyl chloride (518 g, 4.52 mol). The resulting reaction mixture was stirred overnight at room temperature, filtered and concentrated in vacuo to an oil. The oil was dissolved in CH₂Cl₂ and purified by filtration through silica gel. The appropriate fractions were combined and concentrated in vacuo to give the title compound 335 g (65%). TLC (Rf: 0.3; 20% EtOAc/Hexane). ¹H NMR (CDCl₃) δ2.1 (m, 2H, CH₂), 2.96 (s, 3H, CH₃), 3.59 (t, 2H, CH₂), 4.28 (t, 2H, CH₂). ¹³C NMR (CDCl₃) δ31.5 (CH₂), 37.0 (CH₃), 40.2 (CH₂), 66.3 (CH₂).

EXAMPLE 5 1-(p-Toluenesulfonyl)-3-chloro-1-propanol

To 3-Chloro-1-propanol (5.02 mL, 60 mmol) was added CH₃CN (200 mL), p-toluenesulfonyl chloride (17 g, 90 mmol) and pyridine (7.3 mL, 90 mmol). The reaction mixture was stirred at room temperature for 12 hours under an atmosphere of argon. Saturated NaHCO₃ (200 mL, aq) was added and stirring was continued for 15 minutes. The mixture was then poured into a separatory funnel and extracted several times with CH₂Cl₂. The CH₂Cl₂ extracts were combined and dried over Na₂SO₄. The CH₂Cl₂ layer was filtered and concentrated in vacuo to give 12.35 g (83.8%) of the title compound. TLC (Rf: 0.5; 20% EtOAc/Hexane). ¹H NMR (CDCl₃) δ2.1 (m, 2H, CH₂), 2.5 (s, 3H, CH₃), 3.6 (t, 2H, CH₂), 4.2 (t, 2H, CH₂), 7.6 (d & d, 4H, Ar). ¹³C NMR (CDCl₃) δ21.4 (CH₃), 31.5 (CH₂), 40.2 (CH₂), 66.7 (CH₂), 127.8 (Ar), 129.8 (Ar), 132.5 (Ar), 144.9 (Ar).

EXAMPLE 6 1-O-Phthalimido-3-bromo-1-propanol

A mixture of N-hydroxyphthalimide (16.3 g, 100 mmol) and 1,3-dibromopropane (20.19 g, 100 mmol) in dry DMF (150 mL) and triethyl amine (15.33 mL, 110 mmol) is stirred at 20 to 75° C. for 1 to 10 hours. After filtration, the mixture is evaporated to dryness in vacuo. The residue is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 7 N1-t-Boc-N2-(3-chloro)propyl-diaminoethane (3)

Method 1

N-t-Boc-diaminoethane (6.75 g, 42.13 mmol), and 1-(methanesulfonyl)-3-chloropropanol (30.59 g, 177 mmol) was stirred in THF (80 mL) at room temperature under an atmosphere of argon. Sodium carbonate (21 g, 198 mmol) was added and the reaction mixture was equilibrated to room temperature with stirred for 12 hours. 0.5 M NaH₂PO₄ (100 mL, aq) was added and the aqueous layer was separated and extracted with toluene. The aqueous layer was made basic with NaOH and extracted with ether. The combined ether extracts were dried over Na₂SO₄. The dried ether layer was filtered and evaporated to an oily residue. The residue was purified by silica gel flash column chromatography using MeOH/CH₂Cl₂ as the eluent. The pure fractions were pooled together and evaporated to dryness to give 0.45 g (49.5%) of the title compound. TLC (Rf: 0.5; 20% MeOH/CH₂Cl₂). ¹H NMR (CDCl₃) δ1.4 (s, 9H, t-butyl CH₃), 1.9 (m, 2H, CH₂), 2.7 (q, 4H, CH₂), 3.2 (m, 2H, CH₂), 3.6 (t, 2H, CH₂), 4.9 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.4 (CH₃), 32.7 (CH₂), 40.3 (CH₂), 42.9 (CH₂), 46.4 (CH₂), 49.1 (CH₂), 79.3 (C(CH₃)₃), 156.2 (CO).

Method 2

A mixture of N-t-Boc-diaminoethane (94 g, 0.59 mol), anhydrous sodium carbonate (100 g, 0.94 mol), 1-(methanesulfonyl)-3-chloropropanol (278 g, 1.6 mol) in dry THF (2000 mL) was heated to 45° C. with vigorous stirring for 18 hours. The reaction mixture was filtered and the mother liquer concentrated in vacuo. The gum was partitioned between ether and water and extracted with ether (2×500 mL). The combined ether extracts were extracted with 3% HCl solution (2×500 mL) and the aqueous layer was immediately made basic with Na₂CO₃ (pH 8.5). The aqueous layer was extracted with ether (2×500 mL), dried (MgSo₄), filtered, and concentrated in vacuo to give the crude product 74 g (47% purity). The crude product was purified by silica gel flash column chromatography using CH₂Cl₂/MeOH 8:2 as the eluent to give the title compound. ¹H NMR (CDCl₃) δ1.4 (s, 9H, t-butyl), 1.9 (m, 2H, CH₂), 2.7 (q, 4H, CH₂), 3.2 (m, 2H, CH₂), 3.6 (t, 2H, CH₂), 4.9 (x, 1H, NH).

EXAMPLE 8 N-[N-t-Boc(2-aminoethyl)]-O-phthalimido-3-amino-1-propanol (5)

A mixture of N-t-Boc-diaminoethane (100 mmol) and 1-O-phthalimido-3-bromo-1-propanol (100 mmol) in dry DMF and triethyl amine (110 mmol) is stirred at 20 to 75° C. for 1 to 25 hours. After filtration, the mixture is evaporated to dryness under reduced pressure. The residue is distributed between water and ethyl acetate. The organic layer is separated, dried (MgSO₄), and concentrated in vacuo to dryness. The residue is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 9 N-3-[N-t-Boc(2-aminoethyl)]-N-3-tritylsulfenyl-3-amino-1-chloropropane

N1-t-Boc-N2-(3-chloro)propyl-diaminoethane (420 mg, 1.7 mmol), triphenylmethanesulfenyl chloride, i.e. tritylsulfenyl chloride, (0.42 g, 1.36 mmol), and pyridine (0.7 mL, 8.5 mmol) were stirred in CH₂Cl₂ (30 mL) under an atmosphere of argon for 12 hours. 0.5 M NaH₂PO₄ (20 mL, aq) was added and the aqueous layer was extracted several times with CH₂Cl₂. The combined CH₂Cl₂ extracts were combined and dried over Na₂SO₄. The dried CH₂Cl₂ layer was filtered and evaporated to an oily residue. The residue was purified by silica gel flash column chromatography using EtOAc/Hexane as the eluent. The pure fractions were pooled and evaporated in vacuo to give 150 mg (17.3%) of the title compound. TLC (Rf: 0.5; 20% EtOAc/Hexane). ¹H NMR (CDCl₃) δ1.4 (s, 9H, t-butyl CH₃), 1.9 (m, 2H, CH₂), 2.9 (m, 4H, CH₂), 3.2 (m, 2H, CH₂), 3.4 (t, 2H, CH₂), 4.6 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.4 (CH₃), 29.7 (CH₂), 37.9 (CH₂), 42.2 (CH₂), 53.4 (CH₂), 56.5 (CH₂), 79.3 (C(CH₃)₃), 127.2 (Ar), 127.9 (Ar), 130.1 (Ar), 143.0 (Ar), 156.2 (CO).

EXAMPLE 10 N-[N-t-Boc-(2-aminoethyl)]-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol (5b)

Sodium carbonate (7.5 mmol) and N-hydroxyphthalimide (0.75 mmol) are added to N-[t-Boc(2-aminoethyl)]-N-tritylsulfenyl-3-amino-1-chloropropane (1.7 mmol) in DMF (5 mL). The reaction mixture is stirred under an atmosphere of argon at 80° C. for 6 hours and at room temperature for an additional 12 hours. After filtration, H₂O (about 20 mL) is added and the aqueous layer is extracted several times with ether. The combined ether extracts are dried over Na₂SO₄ and filtered. The filtrate is evaporated to give the title compound.

EXAMPLE 11 N-(2-aminoethyl)-O-phthalimido-3-amino-1-propanol (8a)

A mixture of N-[N-t-Boc-(2-aminoethyl)]-O-phthalimido-3-amino-1-propanol and 50% aqueous trifluoroacetic acid/methylene chloride (1:1) is heated at 20 to 50° C. for 1 to 24 hours and treated with saturated NaHCO₃. The mixture is evaporated to dryness under reduced pressure. The residue is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 12 N3-[N-t-Boc(2-aminoethyl)]-O-amino-3-amino-1-propanol (7a)

To N-[N-t-Boc(2-aminoethyl)]-O-phthalimido-3-amino-1-propanol (420 mg, 1.7 mmol) in DMF (5 mL) was added, sodium carbonate (80 mg, 7.5 mmol) and N-hydroxyphthalimide (0.12 g, 0.75 mmol). The reaction mixture was stirred under an atmosphere of argon at 80° C. for 6 hours and at room temperature for an additional 12 hours. After filtration, H₂O (about 20 mL) was added and the aqueous layer was extracted several times with ether. The combined ether extracts were dried over Na₂SO₄ and filtered. The filtrate was evporated to give the title compound. TLC (Rf: 0.4; 20% MeOH/Hexane). ¹H NMR (CDCl₃) δ0.9 (m, 1H, NH), 1.4 (s, 9H, t-butyl CH₃), 1.8 (s, 2H, NH₂), 2.1 (m, 2H, CH₂), 2.5 (t, 2H, CH₂), 3.1 (m, 2H, CH₂), 3.2 (t, 4H, CH₂), 4.9 (s, 1H, NH). ¹³C NMR (CDCl₃) δ28.4 (CH₃), 29.7 (CH₂), 38.4 (CH₂), 55.2 (CH₂), 58.8 (CH₂), 75.9 (CH₂), 79.3 (C(CH₃)₃), 156.2 (CO).

EXAMPLE 13 N1-t-Boc-N2-(3-chloro)propyl-N2-tosyl-diaminoethane (4d)

A solution of crude N1-t-Boc-N2-(3-chloro)propyl-diaminoethane (71.8 g ˜47%, ˜0.13 mol) in CH₂Cl₂ (˜1000 mL), triethylamine (50 mL, 0.36 mol) and tosyl chloride (24 g, 0.237 mol) was stirred at room temperature for 16 hours. The solution was washed with cold HCl (3%, 2×300 mL), saturated NaHCO₃ (1×100 mL), saturated NaCl (1×100 mL), dried (MgSO₄), filtered and concentrated in vacuo to a solid. The solid was purified by silica gel flash column chromatography to give 55.9 g (99%) of the title compound, (mp 95-96° C.). ¹H NMR (CDCL₃) δ1.42 (s, 9H, t-Butyl), 2.0 (m, 2H, CH₂), 2.41 (s, 3H, CH₃), 3.22 (m, 6H, CH₂), 3.55 (m, 2H, CH₂), 4.91 (bs, 1H, NH), 7.30 (d, 2H, ArH), 7.66 (d, 2H, ArH).

EXAMPLE 14 N-[N-t-Boc(2-aminoethyl)]-N-tosyl-O-phthalimido-3-amino-1-propanol (5d)

A suspension of N1-t-Boc-N2-(3-chloro)propyl-N2-tosyl-diaminoethane (27 g, 0.69 mol), sodium iodide (13.5 g, 0.09 mol), sodium carbonate (10.8 g, 0.10 mol) and N-Hydroxyphthalimide (16.5 g, 0.1 mol) in DMF (1000 mL) was stirred vigorously at 80° C. for 24 hours. The reaction mixture was concentrated in vacuo, the residue was dissolved in CH₂Cl₂ and washed thoroughly with H₂O (3×200 mL). The organic layer was dried (MgSO₄), filtered and concentrated in vacuo to afford a solid. Recrystallization from MeOH gave the title compound 20.0 g (56%) (mp 111-112° C.). ¹H NMR (CDCl3) δ1.41 (s, 9H, t-butyl), 2.0 (m, 2H, CH₂), 2.41 (s, 3H, Ar—CH₃), 3.20 (m, 6H, CH₂), 4.25 (t ,2H, CH₂), 5.07 (bs, 1H, NH), 7.29 (d, 2H, ArH), 7.67 (m, 6H, ArH).

EXAMPLE 15 N-Trifluoroacetyl-3-amino-1-O-dimethoxytritylpropanol

3-Amino-1-propanol (1 g, 13.31 mmol) was dissolved in CH₂Cl₂ (40 ml) and 1 equivalent of ethyltrifluoroacetate (1.58 mL, 13.31 mmol) was added at room temperature. The reaction was complete in 2 hours as indicated by TLC. The reaction mixture was concentrated in vacuo and the resulting residue was coevaporated with pyridine (3×25 ml). The clear oil was re-dissolved in pyridine (50 ml) and one equivalent of triethylamine (1.87 ml, 13.31 mmol) was added. Dimethoxytritylchloride (4.51 g, 13.31 mmol) was added in four equal portions. The reaction was complete in 20 hours as indicated by TLC. The reaction mixture was partitioned between CH₂Cl₂ and water. The CH₂Cl₂ layer was separated, dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue was purified by silica gel flash column chromatography using a gradient of 5% to 10% EtOAc in hexanes with 1% triethyl amine as the eluent. The appropriate fractions were pooled and concentrated in vacuo to give 5.29 g (84%) of the title compound. ¹H NMR (DMSO) δ1.79 (m, 2H, CH₂), 3.01 (t, 2H, CH₂), 3.32 (t, 2H, CH₂), 3.75 (s, 6H, 2x OCH₃), 6.88 (d, 4H, DMT) 7.23-7.40 (m, 9H, DMT), 9.36 (bs, 1H, NH). ¹⁹F NMR (DMSO) δ−75.72 (s, CF₃), (¹⁹F peaks referenced to trifluoroacetic acid).

EXAMPLE 16 N-Methylacetate-N-Trifluoroacetyl-3-amino-1-O-dimethoxytritylpropanol

N-(Trifluoroacetyl)-3-amino-1-O-dimethoxytritylpropanol (40 g, 84.50 mmol) was dissolved in DMF (600 ml) and cooled in an ice bath to 0° C. NaH (60% dispersion, 4 g, 1.2 eq., 101.40 mmol) was added in 4 equal portions and the reaction mixture was allowed to stir for 2 hours at 0° C. before methylbromoacetate (10.31 mL, 92.95 mmol) was added dropwise. The reaction was slowly warmed up to room temperature overnight. The reaction was complete in 20 hours as indicated by TLC. The reaction mixture was concentrated in vacuo to approximately 100 ml. The reaction mixture was then partitioned between H₂O and CH₂Cl₂ (100 ml 1:1). The CH₂Cl₂ layer was dried (MgSO₄) and concentrated in vacuo. The resulting residue was purified by silica gel column flash chromatography using a gradient of 5% to 10% EtOAc in hexanes with 1% triethyl amine as the eluent. The appropriate fractions were pooled and concentrated in vacuo to give the title compound 35.90 g (83%). 1H NMR (CDCl₃) δ1.89 (m, 2H, CH₂), 3.12 (dd, 2H, CH₂), 3.61 (dd, 2H, CH₂), 3.70 (x, 6H, 2x OCH₃), 3.76 (d, 3H, CH₃), 4.08 (s, 2H, CH₂), 6.82-7.43 (m, 13H, DMT). ¹⁹F NMR (CDCl₃) δ−75.57 s, (CF₃), −75.15 (s, CF₃), (peaks referenced to trifluoroacetic acid). ¹³C NMR (CDCl3) spectra is consistent with structure.

EXAMPLE 17 N-(2-Hydroxyethyl)-3-amino-1-O-dimethoxytritylpropanol

N-Methylacetate-3-amino-1-O-dimethoxytritylpropanol (4.40 g, 8.62 mmol) was dissolved in a minimal amount of CH₂Cl₂ (75 ml) and MeOH (200 ml) was added. NaBH₄ (1.30 g, 34.48 mmol) was added in four equal portions. The reaction mixture was stirred at room temperature for 18 hours. After 18 hours the reaction had gone to completion as indicated by TLC. The reaction mixture was concentrated in vacuo to leave a white waxy solid which was partitioned between H₂O and EtOAc (100 mL, 1:1). The H₂O layer was extracted with EtOAc (3×50 ml). The EtOAc extracts were collected and dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue was purified by silica gel flash column chromatography using a gradient of 5% to 10% MeOH in CH₂Cl₂ with 1% triethyl amine. The appropriate fractions were pooled and concentrated in vacuo to give the title compound 1.42 g (42%).

EXAMPLE 18 N-(2-Hydroxyethyl)-N-tritylsulfenyl-3-amino-1-O-dimethoxytritylpropanol

N-(2-Hydroxyethyl)-3-amino-1-O-dimethoxytritylpropanol (5 g, 11.86 mmol) is dissolved in pyridine (100 ml) and the reaction flask is flushed with Argon and cooled to 0° C. in an ice bath. Trimethylsilylchloride (3.86 g, 35.58 mmol) is added dropwise and the reaction mixture is stirred for 1 hour. Triphenylmethanesulfenyl chloride (0.42 g, 1.36 mmol) is dissolved in CH₂Cl² and added via dropping funnel to the cooled reaction mixture. The reaction mixture is warmed to room temperature and stirred for 18 hours. The reaction mixture is concentrated in vacuo and the resultant residue is partitioned between H₂O and EtOAc (100 ml, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are pooled, dried (MgSO₄) and filtered. The filtrate is concentrated in vacuo and the residue is purified by silica gel flash column chromatography with EtOAc and hexanes with 1% triethyl amine as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 19 N-[2-(O-p-Toluenesulfonyl)hydroxyethyl]-N-tritylsulfenyl-3-amino-1-O-dimethoxytritylpropanol

N-(2-Hydroxyethyl)-N-tritylsulfenyl-3-amino-1-O-dimethoxytritylpropanol (5.0 g, 7.49 mmol) is dissolved in pyridine (100 ml) and p-toluenesulfonylchloride (2.54 g, 7.49 mmol) dissolved in CH₂Cl₂ (25 mL) was added via dropping funnel. H₂O and CH₂Cl₂ (100 ml, 1:1) are added to the reaction mixture. The H₂O layer is separated and extracted with CH₂Cl₂ (3×50 mL). The CH₂Cl₂extracts are pooled and dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using EtOAc and hexanes with 1% triethyl amine as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give title compound.

EXAMPLE 20

N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-O-dimethoxytrityl-propanol

N-[2-(O-p-Toluenesulfonyl)hydroxyethyl]-N-tritylsulfenyl-3-amino-1-O-dimethoxytritylpropanol (5.0 g, 6.1 mmol) is dissolved in DMF (100 ml) and cooled to 0° C. NaN₃ (0.44 g, 6.76 mmol) is added and the reaction mixture is heated to 40° C. in an oil bath. Upon completion of the reaction as shown by TLC, the reaction mixture is concentrated in vacuo and the residue is partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 ml). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using EtOAc and hexanes with 1% triethyl amine as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 21 N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-propanol

N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-O-dimethoxytritylpropanol (5.0 g, 6.93 mmol) is dissolved in a minimal amount of cold 80% glacial acetic acid. The reaction mixture is monitored by TLC to completion. The reaction mixture is partitioned between H₂O and EtOAc (100 mL, 1:1). The aqueous layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography with EtoAc/CH₂Cl₂ as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 22 N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-O-phthalimidopropanol

N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-propanol (5.0 g, 11.8 mmol) and N-Hydroxyphthalimide (2.90 g, 17.8 mmol) are dissolved in distilled THF and the reaction flask is flushed with Argon. The reaction is cooled to 0° C. and diisopropylazodicarboxylate is added dropwise (slowly so the orange color created by the diisopropylazodicarboxylate dissipates before the next addition). The reaction mixture is allowed to warm up to room temperature overnight. The reaction mixture is concentrated in vacuo and the residue is partitioned between EtOAc and H₂O (100 ml, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The collected EtOAc fractions are dried (MgSO₄), filtered and concentrated in vacuo. The crude material is purified by silica gel flash column chromatography using EtOAc/hexanes as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 23 N-(2-Aminoethyl)-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol (8b)

N-(2-Azidoethyl)-N-tritylsulfonyl-3-amino-1-O-phthalimidopropanol (5.0 g, 8.8 mmol) is dissolved in THF (100 mL) and a catalytic amount of H₂O is added. Triphenylphosphine (2.54 g, 9.7 mmol) is added at room temperature and the reaction mixture is stirred for 5 hours. The reaction mixture is partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSo₄), filtered and concentrated in vacuo. The residue is dissolved in CH₂Cl₂ (100 mL) and cooled to 0° C. Methylhydrazine (0.44 g, 9.7 mmol) is added to the reaction mixture. The reaction mixture is stirred and then concentrated in vacuo. The resulting residue is partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are pooled, dried (MgSO₄), filtered and concentrated in vacuo. The resulting residue is purified by silica gel column chromatography using MeOH/CH₂Cl² as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 24 N-(2-Hydroxyethyl)-3-amino-1-propanol

N-(2-Hydroxyethyl)-3-amino-1-O-dimethyoxytritylpropanol (5 g, 11.86 mmol) is dissolved in 80% AcOH (100 mL). The reaction is stirred until complete, as indicated by TLC. The reaction mixture is concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using MeOH/CH₂Cl₂ as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 25 N-(2-Hydroxyethyl)-N-tritylsulfenyl-3-amino-1-propanol

N-(2-Hydroxyethyl)-3-amino-1-propanol (5.0 g, 41.9 mmol) is coevaporated several times with pyridine (20 mL) and then dissolved in pyridine (100 mL). The reaction flask is flushed with Argon and trimethylsilylchloride (2.47 g, 209.5 mmol) is added dropwise. The reaction mixture is stirred for 1 hour. Triphenyl methanesulfenyl chloride (14.32 g, 46.09 mmol) is dissolved in CH₂Cl₂and added via dropping funnel to the cooled reaction mixture. The reaction mixture is warmed to room temperature and stirred for 18 hours. The reaction mixture is concentrated in vacuo and the resultant residue is partitioned between H₂O and EtOAc (100 ml, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 ml). The EtOAc extracts are pooled, dried (MgSO₄) and filtered. The filtrate is concentrated in vacuo and the residue is purified by silica gel flash column chromatography with EtOAc/hexanes as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 26 N-(2-Tosylethyl)-N-tritylsulfenyl-3-amino-1-tosylpropanol

N-(2-Hydroxyethyl)-N-tritylsulfenyl-3-amino-1-propanol (5.0 g, 12.64 mmol) is dissolved in pyridine (100 mL) and cooled to 0° C. p-Toluensufonylchloride (2.65 g, 13.9 mmol) is dissolve in CH₂Cl₂ (50 mL) and added to the reaction mixture at 0° C. via dropping funnel. The reaction is monitored by TLC to completion. The reaction mixture is concentrated in vacuo and the resultant residue is dissolved in EtOAc and washed with H₂O (3×50 mL) and brine (2×50 mL). The EtOAc is dried (MgSO₄), filtered and concentrated in vacuo. The residue is purified by silica gel column chromatography using EtOAc/hexanes as eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 27

N-(2-O-tosylethyl)-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol,N-(2-O-phthalimidoethyl)-N-tritylsulfenyl-3-amino-1-tosylpropanol

N-(2-Tosylethyl)-N-tritylsulfenyl-3-amino-1-tosylpropanol (5.0 g, 7.12 mmol), triphenylphosphine (2.05 g, 7.83 mmol) and N-hydroxyphthalimide (1.74 g, 10.68 mmol) are dissolved in dry THF under an atmosphere of argon. The reaction mixture is cooled to 0° C. and diisopropyl azodicarboxylate (1.89 g, 8.54 mmol) is added dropwise (slowly so the orange color created by the diisopropyl azodicarboxylate dissipates before the next addition). The reaction mixture is warmed up to room temperature and stirred for 18 hours. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The resultant residue is purified by silica gel flash column chromatography using EtOAc/hexanes as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give both of the title compounds.

EXAMPLE 28 N-(2-azidoethyl)-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol

N-(2O-tosylethyl)-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol (5.0 g, 72.2 mmol) is dissolved in dry DMF (100 mL). NaN₃ (0.56 g, 8.66 mmol) is added to the reaction mixture. The reaction is warmed up to 40 0C. The reaction is monitored by TLC. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The collected EtOAc fractions are dried (MgSO₄). filtered and concentrated in vacuo. The resultant residue is purified by silica gel flash column chromatography using EtOAc/hexanes as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 29 N-(2-Aminoethyl)-N-tritylsulfenyl-3-amino-1-(-O-amino)propane (6b)

N-(2-azidoethyl)-N-tritylsulfenyl-3-amino-1-O-phthalimidopropanol (5 g, 9.03 mmol) is dissolved in THF (100 mL) and a catalytic amount of H₂O is added to the reaction mixture. Triphenylphosphine (2.6 g, 9.93 mmol) is added at room temperature and the reaction mixture is stirred. The reaction is monitored by TLC. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The residue is dissolved in CH₂Cl₂ (100 mL) and cooled to 0° C. Methylhydrazine (0.42 g, 9.03 mmol) is added and upon completion as indicated by TLC, the reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 ml, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and the filtrate concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using MeOH/CH₂Cl₂as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 30 N-(2-O-Phthalimidoethyl)-N-tritylsulfenyl-3-amino-1-azidopropane

N-(2-O-phthalimidoethyl)-N-tritylsulfenyl-3-amino-1-tosylpropanol (5.0 g, 9.51 mmol) is dissolved in dry DMF (100 mL). NaN₃ (0.74 g, 11.41 mmol) is added to the reaction mixture. The reaction mixture is warmed up to 40° C. The reaction progress is monitored by TLC. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The resultant residue is purified by silica gel flash column chromatography using EtOAc/hexanes as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 31 N3-(2-O-aminoethyl)-N3-tritylsulfenyl-1,3-diaminopropane

N-(2-O-Phthalimidoethyl)-N-tritylsulfenyl-3-amino-1-azidopropane (5.0 g, 9.03 mmol) is dissolved in THF (100 mL) and a catalytic amount of H₂O is added to the reaction mixture. Triphenylphosphine (2.61 g, 9.93 mmol) is added at room temperature and the reaction mixture is allowed to stir. Reaction progress is monitored by TLC. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂O (100 ml, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The residue is dissolved in CH₂Cl₂(100 mL) and cooled to 0° C. Methylhydrazine (0.46 g, 9.93 mmol) is added to the reaction mixture drop wise. The reaction mixture is stirred until complete by TLC. The reaction mixture is concentrated in vacuo and the residue partitioned between EtOAc and H₂ (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and concentrated in vacuo. The resultant residue is purified by silica gel column chromatography using MeOH/CH₂Cl₂ as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 32 3-Azido-1-propanol

3-chloro-1-propanol (10 mL, 120 mmol) and sodium azide (8.6 g, 132 mmol) were stirred in DMF (400 mL) with heating to about 60° C. for about 16 hours. The reaction mixture was cooled to room temperature and ethyl ether (˜800 mL) was added. The mixture was stirred for about 15 minutes and water (˜1 L) was added. The ethyl ether layer was separated and dried over Na₂SO₄. The ether layer was filtered and the filtrate evaporated in vacuo to give about 8.7 g (71.4%) of the title compound. TLC (Rf: 0.3; 20% EtOAc/Hexane, I₂). ¹H NMR (CDCl₃) δ1.8 (s, 2H, CH₂), 2.1 (m, 2H, CH₂), 3.5 (t, 2H, CH₂), 3.8 (t, 2H, CH₂).

EXAMPLE 33 2-(3-azidopropoxy)-4,6-diallyloxy-s-triazine

To 3-azido-1-propanol (8.7 g, 85.7 mmol) in THF (200 mL) was added sodium hydride (5.6 g, 128.6 mmol) at −78° C. The reaction mixture was stirred at −78° C. for about minutes and then allowed to equilibrate at room temperature and stirred for an additional 3 hours. The reaction mixture was recooled to −78° C. and added to a solution of 2,4,6-triallyloxy-1,3,5-triazine (21.4 g, 85.7mmole) in THF (200 mL). The reaction mixture was stirred at room temperature for about 16 hours. The reaction mixture was evaporated to a brown residue. The residue was purified by flash column chromatography over silica gel using EtOAc/hexane as the eluent. The pure fractions were pooled together and evaporated to dryness to give 8.5 g (36%) of the title compound. TLC (Rf: 0.5; 20% EtOAc/Hexane, I₂). ¹H NMR (CDCl₃) δ2.1 (m, 2H, CH₂), 3.5 (t, 2H, CH₂), 4.5 (t, 2H CH₂), 4.9 (m, 4H, CH₂), 4.3 (m. 4H, CH₂), 6.0 (m, 2H, CH).

EXAMPLE 34 2-(3-azidopropoxy)-4,6-dioxyacetaldehydo-s-triazine (9)

To 2-(3-azidopropoxy)-4,6-diallyloxy-s-triazine (1.16 g, 4.0 mmol), THF (100 mL) and osmium tetroxide (20.4 mL, 3.2 mmole, 4%, aq) is added sodium periodate (8.6 g, 40 mmole). The reaction mixture is stirred at room temperature overnight and about 20 mL of water is added. The aqueous solution is then extracted several times with EtOAc. Sodium chloride is added to the aqueous layer the resulting mixture is extracted with EtOAc. The EtOAc extracts are combined, dried (Na₂SO₄), filtered, and concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 35 2,4,6-tris(dibromomethyl)-s-triazine

HCL (gas) was bubbled into dibromoacetonitrile (17.3 mL, 0.2 mol) and aluminum bromide (10.7 g, 0.4 mol) for 5 hours. The reaction mixture was held at 0° C. for 3 days. The reaction mixture was heated to 50° C. for 15 minutes, cooled to room temperature and treated with absolute ETOH. The resultant solid was filtered and washed with ETOH. The solid was then washed with CHCl₃ and the combined CHCl₃ layers were concentrated in vacuo to a solid. The solid was crystallized from ETOH to give the title compound 44 g (37%) (mp 130-131° C.). ¹³C NMR (CDCl₃) δ37.45, 176.57.

EXAMPLE 36 2-Amino-4,6-bis(dibromomethyl)-s-triazine

Concentrated NH₄OH (250 mL) was added at room temperature to a solution of 2,4,6-tris(dibromoethyl)-triazine (15 g, 23.3 mmol) in EtOH (500 mL). The reaction mixture was stirred for 15 minutes and H₂O (3000 mL) was added. The reaction mixture was filtered and the resulting solid was recrystallized to give the title compound 3.5 g (32%) (mp 171-173° C.). ¹H NMR (DMSO) δ6.86 (s, 2H, CH), 8.44 (s, 2H, NH₂).

EXAMPLE 37 2,4-bis(dibromomethyl)-6-methyl-s-triazine

A solution of 2,4,6-tris(dibromomethyl)-s-triazine (15 g, 23.3 mmol) in acetone (100 mL) was added to a solution of sodium iodide (150 g, 1.0 mol) in acetic acid (50 mL) and acetone (500 mL). After 10 minutes at room temperature the reaction mixture was added to sodium bisulfite (25 g) in ice water (1000 mL). The aqueous layer was extracted with ether (3×100 mL). The ether layer was dried (MgSo₄), filtered, and concentrated to dryness. The crude product was crystallized first from EtOH and then from cyclohexane to give the title compound (mp 87-88.5° C.). ¹H NMR (CDCL₃) δ2.51 (s, 3H, CH₃), 6.86 (s, 2H, CH).

EXAMPLE 38 2,4-bis(dimorpholinomethyl)-6-methyl-s-triazine

A solution of 2,4-bis(dibromomethyl)-6-methyltriazine is treated with an excess of morpholine at 80° C. to give the title compound.

EXAMPLE 39 Diethyl pyrrole-3,4-dicarboxylate

Tosylmethyl isocyanide (9.8 g, 50 mmol), diethyl fumarate (8.2 mL, 50 mmol) and dry THF (1000 mL) were added dropwise to a stirred suspension of potassium t-butoxide (11.2 g, 100 mmol) and THF (150 mL). The mixture was stirred for 2 hours, saturated NaCl (500 mL) was added, and the mixture was extracted with THF (2×250 mL). The organic layers were dried (Na₂SO₄), filtered and concentrated in vacuo to give a solid. The solid was recrystallized from MeOH to give the title compound 4.6 g (44%) (mp 148-149° C.). ¹H NMR (DMSO) δ1.22 (t, 3H, CH₃), 4.18 (q, 2H, CH₂), 7.39 (s, 2H, ArH), 11.8 (bs, 1H, NH).

EXAMPLE 40 1-N-Propylphthalimido-1H-pyrrole-3,4-dicarboxylate diethyl ester

A solution of diethyl pyrrole-3,4-dicarboxylate (39 g, 0.185 mol) in THF (1600 mL) was treated with NaH (60%, 7.6 g, 0.19 mol). The reaction mixture was heated to reflux for 1 hour. The reaction was then cooled to 30° C. and N-(3-bromopropyl)phthalimide (52 g, 0.19 mol) was added. The reaction mixture was heated to reflux for 1 hour, cooled, filtered, and concentrated in vacuo. The resultant gum was partitioned between ETOAC/H₂O and extracted with EtOAC (2×300 mL). The organic layer was dried (MgSO₄), filtered and concentrated in vacuo. The resultant solid was recrystallized from EtOAC to give the title compound 68 g (92%) (mp 100-101° C.). ¹H NMR (DMSO) δ1.24 (t, 3H, CH), 2.06 (m, 2H, CH₃), 3.57 (t, 2H, CH₂), 4.14 (m, 4H, CH₂), 7.49 (s, 2H, ArH), 7.86 (m, 4H, ArH)

EXAMPLE 41 1-N-Propylphthalimido-3,4-diformalpyrrole

1-N-Propylphthalimido-1H-pyrrole-3,4-dicarboxylate diethyl ester is treated as per the procedures illustrated in Trofimenko, S,. J. Org. Chem., 1964, 29, 3046, with diisobutylaluminum hydride in dry benzene to afford the title compound.

EXAMPLE 42 1-Propylphthalimido-4, 5-dicyanoimidazole

A solution of 4,5-dicyanoimidazole (24.8 g, 0.2 mol) in DMF (500 mL) was treated with NaH (60%, 8.0 g, 0.2 mol) with the temperature maintained below 40° C. The reaction mixture was then stirred at 35° C. for 1 hour. N-(3-bromopropyl)-phthalimide (53.6 g, 0.2 mol) was added and the reaction mixture was stirred for 48 hours at 40° C. The reaction mixture was concentrated in vacuo to a gum and crystallized from EtOAC to give the title compound 33 g (54%) (mp 134-135° C.). ¹H NMR (DMSO) δ2.21 (m, 2H, CH₂), 3.61 (m, 2H, CH₂), 4.30 (m, 2H, CH₂), 7.88 (m, 4H, ArH), 8.36 (s, 1H, ArH).

EXAMPLE 43 1-Propylphthalimido-4,5-diformalimidazole

1-Propylphthalimido-4,5-dicyanoimidazole is treated as per the procedures illustrated in Trofimenko, S,. J. Org. Chem., 1964, 29, 3046, with diisobutylaluminum hydride in dry benzene to afford the title compound.

EXAMPLE 44 Diethyl-4-bromo-2,6-pyridinedicarboxylate

To chelidamic acid (2.29 g, 11.38 mmol) was added phosphorus pentabromide (14.7 g, 34.14 mmol), and the mixture was stirred. The reaction mixture was heated to 90° C. for 3 hours. The reaction mixture was cooled and CHCl₃ (350 mL) was added and the mixture was filtered. To the filtrate was added absolute ethanol (350 mL), and the mixture was stirred for 2 hours. The volume of the reaction mixture was reduced to approximately 35 mL. The title compound was purified by crystallization upon sitting overnight to give, after a second crop of crystals and purification by silica gel flash column chromatography a yield of 72% (m. p. 95-96° C.). ¹H NMR (CDCl₃) δ1.49 (t, 6H, 2x CH₃), 4.44 (q, 4H, 2x CH₂), 8.39 (s, 2H, 2x Ar). ¹³C NMR (CDCL₃) δ14.19 (CH₃), 62.68 (CH₂), 131.02 (Ar), 134.87 (quaternary-Ar), 149.54 (quaternary-Ar), 163.51 (CO).

EXAMPLE 45 Diethyl-4-(3-azidopropoxy)-2,6-pyridinedicarboxylate

3-Azido-1-propanol (0.266 mL, 3.64 mmol) was dissolved in DMF (5 mL) and cooled to 0° C. NaH (146 mg, 3.64 mmol) was added and the mixture was stirred for 15 minutes. Diethyl-4-bromo-2,6-pyridinedicarboxylate was dissolved in DMF (5 mL) an added to the reaction mixture dropwise. The reaction was complete as indicated by TLC in 1 hour. The reaction mixture was partitioned between CH₂Cl₂and water. The water was separated and extracted with CH₂Cl₂. The CH₂Cl₂ layers were combined, dried (MgSO₄) and concentrated to an oil. The oil was purified by silica gel flash column chromatography to give a yield of 40%. ¹H NMR (CDCl₃) δ1.44 (t, 6H, 2x CH₂), 2.11 (m, 2H, CH₂), 3.54 (t, 2H, CH₂), 4.23 (t, 2H, CH₂), 4.45 (q, 4H, 2x CH₂), 7.78 (2, 2H, 2x Ar).

EXAMPLE 46 4-(3-Azidopropoxy)-2,6-dihydroxymethylpyridine

To a stirred solution of Diethyl-4-(3-azidopropoxy)-2,6-pyridinedicarboxylate (4.2 mmol) in dichloromethane (10 mL) and absolute ethanol (15 mL), was added in portions, NaBH₄ (4.2 mmol) at 25° C. Powdered CaCl₂ (4.2 mmol) was added cautiously in small portions and the evolution of hydrogen was allowed to cease before each further addition. The reaction mixture was stirred for 2 hours. Water (100 mL) was added and the reaction mixture was extracted several times with ethyl acetate. The ethyl acetate layers were combined, dried (MgSO₄) and concentrated in vacuo. The resultant residue was purified by silica gel flash column chromatography to give the title compound. ¹H NMR (DMSO) δ2.00 (m, 2H, CH₂), 3.52 (t, 2H, CH₂), 4.13 (t, 2H, CH₂), 4.45 (d, 4H, 2x CH₂), 5.36 (t, 2H, 2x OH), 6.87 (s, 2H, 2x AR).

EXAMPLE 47 4-(Azidopropoxy)-pyridine-2,6-dialdehyde

DMSO (1.21 mL, 17.1 mmol) was diluted with CH₂Cl₂ (approximately 25 mL) and cooled to −78° C. Oxalyl chloride (0.745 mL, 8.45 mmol) was added dropwise and the reaction mixture was stirred for 15 minutes. 4-(3-azidopropoxy)-2,6-dihydroxymethylpyridine (1 g, 4.27 mmol) dissolved in CH₂Cl₂ (10 mL) was added slowly to the cooled reaction mixture. After 0.5 hour triethylamine (2.77 mL, 19.70 mmol) was added dropwise to the reaction mixture. The dry ice/acetone bath was removed and the reaction mixture was warmed to room temperature for approximately 40 minutes. The reaction mixture was partitioned between CH₂Cl₂ and water and extracted several times with CH₂Cl₂. The CH₂Cl₂ layers were combined, dried (MgSO4) and concentrated in vacuo. The resulting residue was purified by silica gel flash column chromatography to give the title compound. ¹H NMR (DMSO) δ2.02 (m, 2H, CH₂), 3.52 (t, 2H, CH₂), 4.31 (t, 2H, CH₂), 7.64 (s, 2H, 2x Ar), 10.01 (s ,2H, CHO). ¹³C NMR (DMSO) δ27.61 (CH₂), 47.40 (CH₂), 66.22 (CH₂), 111.58 (Ar), 154.40 (quaternary, Ar), 166,50 (quaternary, Ar), 192.44 (CHO).

EXAMPLE 48 (7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane)[11](2,6) pyridinophane

N-(2-Aminoethyl)-N-tritylsulfenyl-3-amino-1-(-O-amino)-propane, 4-(azidopropoxy)-pyridine-2,6-dialdehyde and MgCl₂ in equimolar amounts (0.025 molar) are dissolved in dry MeOH. The reaction mixture is stirred at room temperature for 1 hour and at reflux temperature for 2.5 hours. The reaction mixture is cooled to 0° C. and NaBH₃CN (50 eq.) is added and the reaction mixture is stirred at 0° C. for 1.5 hours and then at room temperature for 16 hours. The reaction mixture is concentrated in vacuo and the residue left behind is partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and the filtrate is concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using MeOH/CH₂Cl₂ as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLE 49 Bis-1,3-(2-hydroxyethyl)-5-(2-p-toluensulfenylethyl) cyanuric acid

Tris-1,3,5-(2-hydroxyethyl)-cyanuric acid (10 g, 38.3 mmol) was dissolved in dry pyridine (700 mL). The reaction mixture was cooled in an ice bath, p-toluensulfenylchloride (4.83 g, 23.0 mmol) dissolved in CH−₂Cl₂ (25 mL) was added dropwise to the above mixture and was stirred for 18 hours. The solvent was reduced to a volume of approximately 30 mL and partitioned between CH₂Cl₂ and water. The CH₂Cl₂layer was collected and dried (MgSO4), filtered and concentrated to a yellow oil. The oil was purified by silica gel flash column chromatography to give a 60% yield of the title compound. ¹H NMR (DMSO) δ2.40 (s, 3H, Tosyl-CH₃), 3.49 (t, 4H, 2x CH₂), 3.72 (t, 4H, 2x CH₂), 4.00 (t, 2H, CH₂), 4.24 (t, 2H, CH₂), 4.79 (bs, 2H, 2x OH), 7.41 (d, 2H, Tosyl-Ar), 7.70 (d, 2H, Tosyl-Ar). ¹³C NMR (DMSO) δ21.14 (CH₃), 40.91 (CH₂), 44.29 (CH₂), 57,44 (CH₂), 66.89 (CH₂), 127.47 (Tosyl-Ar), 130.14 (Tosyl-Ar), 132.09 (Tosyl-Ar), 145.11 (Tosyl-Ar), 148.66 (CO).

EXAMPLE 50 Bis-1,3-(2-hydroxyethyl)-5-(2-azidoethyl) cyanuric acid

Bis-1,3-(2-hydroxyethyl)-5-(2-p-toluensulfenylethyl) cyanuric acid (4.63 g, 11.15 mmol) was dissolved in DMF (150 mL). sodium azide (1.09 g, 16.72 mmol) was added in one portion and the reaction mixture was stirred overnight. The solvent was removed and the residue partitioned between CH₂Cl₂/water, the water was extracted 10 times with CH₂Cl₂and the CH₂Cl₂extracts were combined, dried (MgSO4) and concentrated to a yellow oil. The oil was purified by silica gel flash column chromatography to give the title compound in a yield of 91%. ¹H NMR (DMSO) δ3.54 (m, 6H, 3x CH₂), 3.86 (t, 4H, 2x CH₂) 3.99 (t, 2H, CH₂), 4.80 (t, 2H, 2x OH). ¹³C NMR (CDCl₃) δ41.45 (CH₂), 45.08 (CH₂) 48.36 (CH₂), 49.87 (CH₂), 149.20 (CO).

EXAMPLE 51 1,3-(Acetaldehydo)-5-(2-azidoethyl) cyanuric acid

Dry DMSO (0.390 mL, 5.49 mmol) and dry CH₂Cl₂(20 mL) are cooled to −78° C. and oxalyl chloride (0.240 mL, 2.75 mmol) was added slowly with stirring for 10 minutes. Bis-1,3-(2-hydroxyethyl)-5-(2-azidoethyl) cyanuric acid (0.263 mg, 1.37 mmol) was dissolved in dry CH₂Cl₂ and added to the reaction mixture. The reaction was stirred at −78° C. for 0.5 hour before triethylamine (0.881 mL, 6.32 mmol) was added dropwise and the reaction mixture was warmed to room temperature. The reaction mixture was partitioned between water and CH₂Cl₂. The CH₂Cl₂ layer was separated, dried (MgSO₄), filtered and concentrated in vacuo. The resulting oil was purified by silica gel column chromatography to yield 75% of the title compound. ¹H NMR (DMSO) δ3.55 (t, 2H, CH₂), 4.00 (t, 2H, CH₂), 4.74 (s, 4H, 2x CH₂), 9.58 (s, 1H, CHO).

EXAMPLE 52 2,4,6-Triethoxycarbonyl-1,3,5-triazine

Hydrogen chloride gas was bubbled through neat ethylcyanoformate (0.997 ml, 10.1 mmol) until the solution became a white solid, approximately 2 hours. The solid was partitioned between CH₂Cl₂ and water. The CH₂Cl₂ layer was collected dried (MgSO4) and concentrated to a white solid. The product was crystallized from hot absolute ethanol to give the title compound (m. p. 169-170° C.). ¹H NMR (CDCl₃) δ1.42 (t, 9H, 3x CH₃), 4.50 (q, 6H, 3x CH₂). ¹³C NMR (DMSO) δ14.06 (CH₃), 64.02 (CH₂), 161.27 (CO), 166.86 (Triazine Ar).

EXAMPLE 53 2,4,6-Trihydroxymethyl-s-triazine

2,4,6-Triethoxycarbonyl-s-triazine (1 g, 3.36 mmol) is dissolved in dichloromethane (15 mL) and absolute ethanol (25 mL) then cooled to 0° C. before sodium borohydride (127 mg, 3.36 mmol) is added. After 15 minutes calcium chloride (373 mg, 2.97 mmol) is added and the reaction mixture is warmed to room temperature. The reaction mixture is dried to a yellow solid and subjected to soxhlet extraction with ethanol. The ethanol is evaporated to a white solid. The product is crystallized from Methanol and water or purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 54 4-(p-Toluenesulfonylmethyl)-2,6-dihydroxymethyl-s-triazine

2,4,6-Trihydroxymethyl-s-triazine (1 eq.) is dissolved in an excess of pyridine. p-Toluenesulfonylchloride (0.6 eq.) in CH₂Cl₂is added and the reaction mixture is stirred overnight. The solvent volume is reduced to a slurry to which water and dichloromethane are added and the resulting mixture is extracted with CH₂Cl₂. The combined CH₂Cl₂ layers are dried (MgSO4) and concentrated to an oil. The oil is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 55 4-(Azidomethyl) -2,6-dialdehyde-s-triazine (via 4-(Azidomethyl)-2,6-dihydroxymethyl-s-triazine)

4-(p-Toluenesulfonylmethyl)-2,6-dihydroxymethyl-s-triazine is dissolved in DMF and sodium azide (1.1 eq.) is added. The reaction mixture is heated to 50° C. for 4 hours. The DMF is removed under reduced pressure and the residue is partitioned between CH₂Cl₂ and water. The CH₂Cl₂ layer is separated and the water layer is extracted several times with CH₂Cl₂. The CH₂Cl₂layers are combined, dried (MgSO₄), and concentrated. The resultant residue is purified by silica gel flash column chromatography to give 4-(azidomethyl)-2,6-dihydroxymethyl-s-triazine.

DMSO is diluted with CH₂Cl₂and cooled to −78° C. Oxalyl chloride is added slowly and allowed to stir for 0.5 hours. The 4-(azidomethyl)-2,6-dihydroxymethyl-s-triazine dissolved in CH₂Cl₂ is added slowly to the reaction mixture. After 1 hour, triethylamine is added dropwise and the reaction is allowed to warm up to room temperature. The reaction mixture is diluted with water and CH₂Cl₂. The CH₂Cl₂ layer is separated and the water layer is extracted several times with CH₂Cl₂. The CH₂Cl₂layers are combined, dried (MgSO4), and concentrated. The resultant oil is purified by silica gel flash column chromatography to give the title compound.

EXAMPLE 56 (7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane)[11](2,6)s-triazinophane

N-(2-Aminoethyl)-N-tritylsulfenyl-3-amino-1-(-O-amino)-propane (6b), 4-(azidomethyl)-2,6-dialdehyde-p-triazine (9) and MgCl₂ in equimolar amounts (0.025 molar) are dissolved in dry MeOH. The reaction mixture is stirred at room temperature for 1 hour and at reflux temperature for 2.5 hours. The reaction mixture is cooled to 0° C. and NaBH₃CN (50 eq.) is added and the reaction mixture is stirred at 0° C. for 1.5 hours and then at room temperature for 16 hours. The reaction mixture is concentrated in vacuo and the residue left behind is partitioned between EtOAc and H₂O (100 mL, 1:1). The H₂O layer is separated and extracted with EtOAc (3×50 mL). The EtOAc extracts are dried (MgSO₄), filtered and the filtrate is concentrated in vacuo. The resulting residue is purified by silica gel flash column chromatography using MeOH/CH₂Cl₂ as the eluent. The appropriate fractions are pooled and concentrated in vacuo to give the title compound.

EXAMPLES 57-61 Synthesis of first round library (polyaza cyclophane 14 a,b,c,d) from (7-(N-tritylsulfenyl)-2,7,10-triaza-3-oxaundecane) [11] (2,6) s-triazinophane 10 (R=SC(Ph)₃) and four letters (benzaldehyde, Aldrich-B133-4 [L₁]; m-tolualdehyde, Aldrich-T3,550-5 [L₂]; m-anisaldehyde, Aldrich-12,965-8 [L₃]; and 3-nitrobenzaldehyde, Aldrich-N1,084-5 [L₄]. (FIG. 2) EXAMPLE 57

Step A

Method 1

(7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane) [11] (2,6) s-triazinophane 10b (200 mmol) is divided into four equal parts and each is reacted separately with benzaldehyde (L₁), m-tolualdehyde (L₂), m-anisaldehyde (L₃), or 3-nitrobenzaldehyde (L₄). The reactants can be dissolved in a variety of organic solvents such as dichloromethane, dichloroethane, ethyl acetate, toluene, or methanol. 1.5 to 3 equivalents of the aldehyde is employed with a 1 to 3% glacial acetic acid added as a catalyst. Reactions are allowed to proceed from 5 to 24 hours then treated directly with NaCNBH₃ (2-3 equivalents). The reduction reaction mixtures should be stirred at room temperature for 1 to 10 hours, filtered, adjusted to neutrality and evaporated to dryness under reduced pressure. The residues are partitioned between ethyl acetate and aqueous NaHCO₃. The oganic layer is separated, dried (MgSO₄) and filtered and the filtrate evaporated to dryness under reduced pressure. The individual residues can be purified by column chromatography if needed. A sample of each pure cyclophane like compound 11 a,b,c,d is saved for use in Example 69 (Fourth Round). Equal moles of each individual cyclophane like compound is mixed to provide cyclophane like compound 11 with position 1 combinatorialized with the four selected aromatic aldehydes (reductive alkylation provides benzyl moieties).

Method 2

(7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane) [11] (2,6) s-triazinophane 10 (200 mmol) is reacted sequentally, in one pot, with benzaldehyde (L₁), m-tolualdehyde (L₂), m-anisaldehyde (L₃), and 3-nitrobenzaldehyde (L₄). The reactants can be dissolved in a variety of organic solvents such as dichloromethane, dichloroethane, ethyl acetate, toluene, or methanol. 50 mmol L₁, 50 mmol L₂, 50 mmol L₃, and 100 mmol L₄ are added sequentially to a solution of 10b with 1 to 3% glacial acetic acid included as a catalyst. Reactions are allowed to proceed from 5 to 24 hours then the one-pot is treated directly with NaCNBH₃ (2-3 equivalents). The reduction reaction is stirred at room temperature for 1 to 10 hours, filtered, adjusted to neutrality and evaporated to dryness under reduced pressure. The residue is partitioned between ethyl acetate and aqueous NaHCO₃. The organic layer is separated, dried (MgSO₄), filtered, and evaporated to dryness under reduced pressure. The residue can be purified by column chromatography if needed. This form of one-pot sequential addition of letters provides the cyclophane like compound 11 with position 1 combinatorialized with the four selected aromatic aldehydes (reductive alkylation provides benzyl moieties).

Method 3

(7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane) [11] (2,6) s-triazinophane 10b (200 mmol) is reacted in one pot, with one solution of benzaldehyde (L₁), m-tolualdehyde (L₂), m-anisaldehyde (L₃), or 3-nitrobenzaldehyde (L₄). The reactants can be dissolved in a variety of organic solvents such as dichloromethane, dichloroethane, ethyl acetate, toluene, or methanol. A solution of 50 mmol L₁, 50 mmol L₂, 50 mmol L₃, and 50 mmol L₄ were added simultaneously to a solution of 10b with 1 to 3% glacial acetic acid included as a catalyst. The reaction is allowed to proceed from 5 to 24 hours and treated directly with NaCNBH₃ (2-3 equivalents). The reduction reaction is stirred at room temperature for 1 to 10 hours, filtered, adjusted to neutrality and evaporated to dryness under reduced pressure. The residue is partitioned between ethyl acetate and aqueous NaHCO₃. The organic layer is separated, dried (MgSO₄), filtered, and evaporated to dryness under reduced pressure. The residue can be purified by column chromatography if needed. The simultaneous addition of letters provides the cyclophane like compound 11 with position 1 combinatorialized with the four selected aromatic aldehydes (reductive alkylation provides benzyl moieties).

Using the procedure of example 57, libraries are prepared from nitrogenous macrocycles that are derivatized with one, two, three, four or more of the following aldehydes available from Aldrich Chemical Company, Inc., Milwaukee, Wis. The Aldrich catalog number is given in the right hand column and the compound name is given in the left hand column:

Aromatic aldehydes 10793-5 Phenylacetaldehyde D20425 Diphenylacetaldehyde 24582-8 Hydrocinnamaldehyde 24136-9 Phenylpropionaldehyde 28902-7 (+/−)-3-Phenylbutyraldehyde 28899-3 Alpha-amylcinnamaldehyde 16116-0 Alpha-bromocinnamaldehyde 26813-5 4-Stilbenecarboxaldehyde B133-4 Benzaldehyde 11755-2 o-Tolualdehyde 25069-4 Alpha.alpha.alpha-trifluoro-o-tolualdehyde F480-7 2-Fluorobenzaldehyde 12497-4 2-Chlorobenzaldehyde B5700-1 2-Bromobenzaldehyde 10962-2 o-Anisaldehyde 15372-9 2-Ethoxybenzaldehyde N1080-2 2-Nitrobenzaldehyde T3550-5 m-Tolualdehyde 19687-8 Alpha.alpha.alpha-trifluoro-m-tolualdehyde F500-5 3-Fluorobenzaldehyde C2340-3 3-Chlorobenzaldehyde B5720-6 3-Chlorobenzaldehyde 12965-8 m-Anisaldehyde 34648-9 3-(Trifluoromethoxy)-benzaldehyde 34199-1 3-(1,1,2,2-Tetrafluoroethoxy)-benzaldehyde H1980-8 3-Hydroxybenzaldehyde N1084-5 3-Nitrobenzaldehyde 11528-2 Isophthaldehyde T3560-2 p-Tolualdehyde 23363-3 4-Ethylbenzaldehyde 13517-8 4-Isopropylbenzaldehyde 22494-4 Alpha.alpha.alpha-trifluoro-p-tolualdehyde 12837-6 4-Fluorobenzaldehyde 11221-6 4-Chlorobenzaldehyde B5740-0 4-Bromobenzaldehyde A8810-7 p-Anisaldehyde 17360-6 4-Ethoxybenzaldehyde 33363-8 4-Propoxybenzaldehyde 23808-2 4-Butoxybenzaldehyde 37060-6 4-(Trifluoromethoxy)-benzaldehyde 27486-0 Terephthaldehyde mono-(diethyl acetal) 14408-8 4-Hydroxybenzaldehyde 22277-1 4-(Methylthio)benzaldehyde 10976-2 4-(Dimethylamino)benzaldehyde D8625-6 4-(Dimethylamino)benzaldehyde 33851-6 4-(Dibutylamino)benzaldehyde 29355-5 4-(3-Dimethylaminopropoxy)benzaldehyde 13017-6 4-Nitrobenzaldehyde T220-7 Terephthaldicarboxaldehyde 34252-1 3-Fluoro-2-methylbenzaldehyde 34649-7 2-Fluoro-3-(trifluoromethyl)-benzaldehyde 26514-4 2,3-Difluorobenzaldehyde 26515-2 2,6-Difluorobenzaldehyde 14124-0 2-Chloro-6-fluorobenzaldehyde D5650-0 2,6-Dichlorobenzaldehyde 25483-5 2,3-Dichlorobenzaldehyde D13020-6 2,3-Dimethoxybenzaldehyde 29250-8 2,6-Dimethoxybenzaldehyde 31980-5 3-Fluorosalicylaldehyde 12080-4 o-Vanillin 18983-9 2,3-Dihydroxybenzaldehyde 10604-6 2-Chloro-6-nitrobenzaldehyde 16382-1 3-methoxy-2-nitrobenzaldehyde 11750-1 2,6-Dinitrobenzaldehyde 15104-1 2,4-Dimethylbenzaldehyde 15106-8 2,5-Dimethylbenzaldehyde 37682-5 2-Chloro-5-(trifluoromethyl)benzaldehyde 26516-0 3,4-Difluorobenzaldehyde 26517-9 2,4-Difluorobenzaldehyde 26518-7 2,5-Difluorobenzaldehyde 30600-2 3-Chloro-4-fluorobenzaldehyde 34807-4 2-Chloro-4-fluorobenzaldehyde 33954-7 3-Bromo-3-fluorobenzaldehyde D5660-8 3,4-Dichlorobenzaldehyde 14675-7 2,4-Dichlorobenzaldehyde 15212-9 3-Methyl-p-anisaldehyde 15558-6 3-Fluoro-p-anisaldehyde 15429-6 5-Bromo-o-anisaldehyde D13040-0 2,4-Dimethoxybenzaldehyde D13060-5 2,5-Dimethoxybenzaldehyde 14375-8 3,4-Dimethoxybenzaldehyde 25275-1 3-Ethoxy-4-methoxybenzaldehyde P4910-4 Piperonal 26459-8 1,4-Benzodioxan-6-carboxaldehyde 31691-1 4-Hydroxy-3-methylbenzaldehyde 34606-3 2-Chloro-4-hydroxybenzaldehyde 25975-6 5-Chlorosalicylaldehyde 13728-6 5-Bromosalicylaldehyde 14686-2 2-Hydroxy-5-methoxybenzaldehyde 16069-5 2-Hydroxy-4-methoxybenzaldehyde 14368-5 3-Hydroxy-4-methoxybenzaldehyde V110-4 Vanillin 12809-0 3-Ethoxy-4-hydroxybenzaldehyde 34215-7 5-(Trifluoromethoxy)salicylaldehyde D10840-5 3,4-Dihydroxybenzaldehyde D10820-0 2,5-Dihydroxybenzaldehyde 16863-7 2,4-Dihydroxybenzaldehyde 22568-1 4-(Diethylamino)salicylaldehyde C5880-0 5-Chloro-2-nitrobenzaldehyde 13903-3 2-Chloro-5-nitrobenzaldehyde C5870-3 4-Chloro-3-nitrobenzaldehyde 14432-0 4-Hydroxy-3-nitrobenzaldehyde 15616-7 3-Hydroxy-4-nitrobenzaldehyde 27535-2 2-Hydroxy-5-nitrobenzaldehyde H4810-7 5-Hydroxy-2-nitrobenzaldehyde D19360-7 2,4-Nitrobenzaldehyde 29013-0 3,5-Bis(trifluoromethyl)benzaldehyde 29017-3 3,5-Difluorobenzaldehyde 13940-8 3,5-Dichlorobenzaldehyde 36811-3 3,5-Dihydroxybenzaldehyde 12269-2 3,5-Dimethoxybenzaldehyde 36810-5 3,5-Dibenzyloxybenzaldehyde M680-8 Mesitaldehyde 29233-8 2,3,5-Trichlorobenzaldehyde 13061-3 5-Bromoveratraldehyde 13871-1 2,4,6-Trimethoxybenzaldehyde T6840-3 3,4,5-Trimethoxybenzaldehyde 14039-2 3,5-Dimethyl-4-hydroxybenzaldehyde 35768-5 2,6-Dimethyl-4-hydroxybenzaldehyde 14040-6 3,5-Di-tert-butyl-4-hydroxybenzaldehyde hemihydrate 26181-5 3,5-Dichlorosalicylaldehyde 12213-0 3,5-Dibromosalicylaldehyde 28344-4 3,5-Diiodosalicylaldehyde 13060-5 5-Bromovanillin 12948-8 5-Iodovanillin 13879-7 4,6-Dimethoxysalicylaldehyde 25871-7 5-Nitrovanillin S760-2 3,5-Dinitrosalicylaldehyde 25959-4 2,5-Dimethyl-p-anisaldehyde T6540-4 5-Bromo-2,4-dimethybenzaldehyde N2800-0 4-Nitrovanillin 27680-4 3,5-Dinitrosalicylaldehyde 15205-6 2,5-Dimethyl-p-anisaldehyde 29251-6 2-Bromo-2,4-dimethoxybenzaldehyde 15557-8 6-Bromoveratraldehyde 13215-2 2,4,5-Trimethoxybenzaldehyde 27960-9 6-Nitroveratraldehyde 13765-0 6-Nitropiperonal 27679-0 2,5-Dichloroterephthaldehyde 33066-3 2,3,4-Trifluorobenzaldehyde 29231-1 2,3,6-Trichlorobenzaldehyde 15201-3 2,3-Dimethyl-p-anisaldehyde 29627-9 2,4-Dimethoxy-3-methylbenzaldehyde 15209-9 2,3,4-Trimethoxybenzaldehyde 26084-3 2,3,4-Trihydroxybenzaldehyde 32893-6 Tetrafluorobenzaldehyde 10374-8 Pentafluorobenzaldehyde B3468-0 4-Biphenylcarboxaldehyde 19175-2 3-Phenoxybenzaldehyde B2700-5 3-Benzloxybenzaldehyde 19540-5 3-(4-Methylphenoxy)benzaldehyde 19592-8 3-(4-tert-Butylphenoxy)benzaldehyde 19539-1 3-[3-(Trefluoromethyl)phenoxy]benzaldehyde 19530-8 3-(4-Chlorophenoxy)benzaldehyde 19590-1 3-(3,4-Dichlorophenoxy)benzaldehyde 19774-2 3-(3,5-Dichlorophenoxy)benzaldehyde 19589-8 3-(4-Methoxyphonoxy)benzaldehyde 21126-5 4-Phenoxybenzaldehyde 12371-4 4-Benzyloxybenzaldehyde 16361-9 4-Benzyloxy-3-methoxybenzaldehyde 16395-3 3-Benzyloxy-4-methoxybenzaldehyde 34603-9 3-Methoxy-4-(4-nitrobenzyloxy)benzaldehyde D3600-3 3,4-Dibenzyloxybenzaldehyde N10-9 1-Naphthaldehyde N20-6 2-Naphthaldehyde 15134-3 2-Methoxy-1-naphthaldehyde 10324-1 4-Methoxy-1-naphthaldehyde H4535-3 2-Hydroxy-1-naphthaldehyde 27208-6 4-Dimethylamino-1-naphthaldehyde 38201-9 2,3-Naphthalendicarboxaldehyde 15014-2 2-Fluorenecarboxaldehyde 27868-8 9-Anthraldehyde M2965-7 10-Methylanthracene-9-carboxaldehyde 15211-0 10-Chloro-9-anthraldehyde P1160-3 Phenanthrene-9-carboxaldehyde 14403-7 1-Pyrenecarboxaldehyde Aliphatic aldehydes 25254-9 Fromaldehylde 11007-8 Acetaldehyde P5145-1 Propionaldehyde 24078-8 Isobutyraldehyde T7150-1 Trimethylacetaldehyde B10328-4 Butyraldehyde M3347-6 2-Methylbutyraldehyde 11009-4 2-Ethylbutyraldehyde 14645-5 Isovaleraldehyde 35990-4 3,3-Dimethylbutyraldehyde 11013-2 Valeraldehyde 25856-3 2-Methylvaleraldehyde D19050-0 2,4-Dimethylvaleraldehyde 11560-6 Hexanal E2910-9 2-Ethylhexanal 30355-0 3,5,5-Trimethylhexanal H212-0 Heptaldehyde O560-8 Octyl aldehyde N3080-3 Nonyl aldehyde 12577-6 Decyl aldehyde U220-2 Undecylic aldehyde M8675-8 2-Methylundecanal D22200-3 Dodecyl aldehyde 26923-9 Tridecanal T1000-6 Tetradecy aldehyde 11022-1 Acrolein 13303-5 Methacrolein 25614-5 2-Ethylacrolein 25613-7 2-Butylacrolein 13298-5 Crotonaldehyde 19261-9 trans-2-Methyl-2-butenal 29468-3 2-Ethyl-trans-2-butenal 30407-7 3-Methyl-2-butenal 26925-5 trans-2-pentenal 29466-7 2-Methyl-2-pentenal 29097-1 2,2-Dimethyl-4-pentenal 13265-9 trans-2-Hexenal 25176-3 trans-2-Heptenal 30796-3 2,6-Dimethyl-5-heptenal 26995-6 trans-2-Octenal 34364-1 (R)-(+)-Citronellal 37375-3 (S)-(−)-Citronellal 25565-3 trans-2-Nonenal 37562-4 cis-4-Decenal 36733-8 trans-4-Decenal 13227-6 Undecylenic aldehyde 24911-4 dis-9-hexadecenal 27221-3 Cyclopropanecarboxaldehyde 10846-4 Cyclohexanecarboxaldehyde 10933-9 Cyclooctanecarboxaldehyde 30441-7 3-Cyclohexylpropionaldehyde T1220-3 Tetrahydrobenzaldehyde 21829-4 (S)-(−)-Perillaldehyde 26467-9 2,6,6-Trimethyl-1-cyclohexene-1- acetaldehyde 10937-1 5-Norbornen-2-carboxaldehyde 21824-3 (1R)-(−)-Myrtenal 37531-4 Glyoxal-1,1-dimethyl acetal 21877-4 7-Methoxy-3,7-dimethyloctanal 23254-8 3-Ethoxymethacrolein 27525-5 2,5-Dimethoxy-3- tetrahydrofurancarboxaldehyde 26918-2 2,2-Dimethyl-3-hydroxypropionaldehyde G480-2 DL-Glyceraldehyde G478-0 D-Glyceraldehyde 21665-8 L-Glyceraldehyde 34140-1 3-(Methylthio)propionaldehyde 30583-9 3-(Dimethylamino)acrolein 36549-9 3-(Dimethylamino)-2-methyl-2-propenal 17733-4 Pyrubic aldehyde 27706-1 (S)-(−)-2-(Methoxymethyl)-1- pyrrolidinecarboxaldehyde 29211-7 2-Methoxy-1-pyrrolidinecarboxaldehyde 29210-9 2-Methoxy-1-piperidinecarboxaldehyde

EXAMPLE 57-B Synthesis of libraries from cyclophanes and aldehydes using various selected aldehydes EXAMPLE 58

Step B

Repeat Example 57, Step A utilizing Method 1, 2 or 3 applied to the cyclophane like compound 11. This will provide the cyclophane like compound 12 with positions 1 and 2 combinatorialized with substituted benzyl moieties. A portion of this material is retained for use in Example 69 (Fourth Round).

EXAMPLE 59

Step C

The cyclophane like compound 12 (200 mmol) in ethyl acetate is treated with 0.1 N HCl for 5 to 12 hours, adjusted to neutrality, and evaporated to dryness to provide a residue containing the deprotected cyclophane like compound 13. This material can be purified by column chromatography. A portion of this material is retained for use in Example 62 (Second Round). Repeat the procedure of Example 57, for the remaining residue, by utilizing Method 1, 2, or 3, to convert cyclophane like compound 12 to cyclophane like compound 13. Cyclophane like compound 13 has positions 1, 2, and 3 combinatorialized with substituted benzyl moieties.

EXAMPLE 60

Step D

Cyclophane like compound 13 (200 mmol), is stirred in THF (800 mL), H₂O (3.0 mL) and triphenyl phosphine (232 mmol). The reaction mixture is stirred at 50-80° C. for 12-24 hours under an atmosphere of argon. The reaction mixture is evaporated and the residue is dissolved in 800 mL of 0.5 M NaH₂PO₄ solution. The mixture is extracted with EtOAc. The aqueous layer is treated with 3 N NaOH until neutral and then extracted with ether. The NaSO₄-dried ether layer is evaporated to provide the amino ethyl derivative of cyclophane like compound 13. This material is reacted as described in Example 57, utilizing Method 1, (separation of 13 into four equal parts) to provide cyclophane like compound 14 in four equal parts a, b, c and d. These materials (libraries) are utilized in various screening procedures.

EXAMPLE 61

Step E

Method 4

(7-(N-Tritylsulfenyl)-2,7,10-triaza-3-oxaundecane)[11](2,6) s-triazinophane 10b (200 mmol), is dissolved in ethyl acetate and treated with 0.1 N HCl for 5-12 hours, adjusted to neutrality and evaporated to dryness under reduced pressure. The resulting deprotected cyclophane like compound 10a is dissolved in ethyl acetate and treated in one portion with an ethyl acetate mixture of 150 mmol each of benzaldehyde (L₁), m-tolualdehyde (L₂), m-anisaldehyde (L₃), or 3-nitrobenzaldehyde (L₄) containing 1 to 3% glacial acetic acid. The reaction is allowed to proceed for 5 to 24 hours then treated directly with NaCNBH₃ (2-3 equivalents). The reduction reaction is stirred at room temperature for 1 to 10 hours, filtered, adjusted to neutrality and evaporated to dryness under reduced pressure. The residue is partitioned between ethyl acetate and aqueous NaHCO₃. The organic layer is separated, dried (MgSO₄), filtered, and evaporated to dryness under reduced pressure. The residue may be purified by column chromatography if needed. This procedure provides the cyclophane like compound 13. Treatment of the resulting compounds as per the procedure of Example 60, Step D, described above, will provide a first round library of cyclophane like compounds 14 with position 4 fixed with four separate benzyl moieties and positions 1,2 and 3 combinatorialized with the four benzyl moieties.

EXAMPLE 57-B Synthesis of libraries from cyclophanes and aldehydes using various selected aldehydes EXAMPLES 62-63 Synthesis of second round library (cyclophane like compounds 16 a,b,c,d) from the cyclophane like compound 12 having the 1,3,5-triazine group (R=SC(Ph)₃), and four letters (benzaldehyde, Aldrich-B133-4 [L1]; m-tolualdehyde, Aldrich-T3,550-5 [L2]; m-anisaldehyde, Aldrich-12,965-8 [L3]; and 3-nitrobenzaldehyde, Aldrich-N1,084-5 [L4]. Position 4 is assumed to have active letter, L1, determined from screening of round one. Position 3 will be fixed last. (FIG. 3) EXAMPLE 62

Step A

Cyclophane like compound 12 (200 mmol, from first round), in 800 mL of THF, 3.0 mL of H₂O and triphenyl phosphine (232 mmol) is stirred at 50-80° C. for 12-24 hours under an atmosphere of argon. The reaction mixture is evaporated and the residue is dissolved in 0.5 M NaH₂PO₄ (800 mL, aq). The mixture is extracted with EtOAc. The aqueous layer is treated with 3 N NaOH until neutral and then extracted with ether. The NaSO₄-dried ether layer is filtered and evaporated to provide the amino ethyl derivative of cyclophane like compound 12. This material is treated with benzyl aldehyde and subsequently reduced, as described in Example 60, Step D to provide the cyclophane like compound 15 (L1=benzyl). The benzyl moiety is assumed to be the active letter at position 4 as found in Round One.

EXAMPLE 63

Step B

Cyclophane like compound 15 is reacted as described in Example 57, Step A (separation of 13 into four equal parts) to provide cyclophane like compound 16 in four equal parts a, b, c and d. These materials (libraries) are utilized in various screening procedures.

EXAMPLES 64-68 Synthesis of a third round library (cyclophane like compound 21 a,b,c,d) from 1,3,5-triazine cyclophane 10c (R=t-BOC) and four letters (benzaldehyde, Aldrich-B133-4 [L1]; m-tolualdehyde, Aldrich-T3,550-5 [L2]; m-anisaldehyde, Aldrich-12,965-8 [L3]; and 3-nitrobenzaldehyde, Aldrich-N1,084-5 [L4]. Positions 3 and 4 are assumed to have active letter, L1, benzyl, determined from screening of rounds one and two. Position 1 will be fixed last. (FIG. 4) EXAMPLE 64

Step A

The cyclophane like compound 10c (R=t-BOC, 200 mmol) in CH₂Cl₂/pyridine is treated with triphenyl methanesulfenyl chloride (1.1 equivalents) for 12 to 24 hours under an atmosphere of argon. 0.5 M NaH₂PO₄ (aq) was added to neutralize the reaction mixture. The aqueous layer is extracted several times with CH₂Cl₂. The Na₂SO₄-dried CH₂Cl₂ layer is evaporated to give an oily residue which can be purified by column chromatography over silica gel using EtOAc/hexane as the eluent. This procedure will provide cyclophane like compound 17.

EXAMPLE 65

Step B

Cyclophane like compound 17 is treated as described in Example 57, Step A, Method 1, 2 or 3 to provide cyclophane 18.

EXAMPLE 66

Step C

Cyclophane like compound 18 is treated with 50% trifluoracetic acid in CH₂Cl₂ for 5 to 10 hours at room temperature. The solution is neutralized and extracted with CH₂Cl₂. The dried organic layer is evaporated to dryness under reduced pressure. The residue is dissolved in CH₂Cl₂ and treated as per the procedure of Example 57, Method 1, 2, or 3, with benzyl aldehyde followed by NaCNBH₃. This provides the benzyl letter at position 3.

EXAMPLE 67

Step D

The cyclophane like compound 19 is treated as described in Example 60, Step D. In this case only the benzyl moiety, which is derived from benzyl aldehyde/NaCNBH₃ is placed at position 4. This is the active letter presumed found in the first round library. This procedure provides cyclophane like compound 20.

EXAMPLE 68

Step E

The cyclophane like compound 20 is treated with 0.1 N HCl for 5 to 24 hours at room temperature. The solution is neutralized and extracted with ethyl acetate. After drying and evaporating under reduced pressure, the residue is treated as described in Example 57, Method 1, 2 or 3. In this case the benzyl moieties 21 a, b, c, and d which are derived from the appropriate benzyl aldehydes/NaCNBH₃, are placed at position 1. These materials (libraries) are utilized in various screening procedures.

EXAMPLES 69-72 Synthesis of fourth round library (polyaza cyclophane 25 a, b, c and d) from 1,3,5-triazine cyclophane 10c (R=t-BOC) and four letters (benzaldehyde, Aldrich-B133-4 [L1]; m-tolualdehyde, Aldrich-T3,550-5 [L2]; m-anisaldehyde, Aldrich-12,965-8 [L3]; and 3-nitrobenzaldehyde, Aldrich-N1,084-5 [L4]. Positions 1,3 and 4 are assumed to have active letter, L1, benzyl, determined from screening of rounds one, two and three. Position 2 will be fixed last. (FIG. 5) EXAMPLE 69

Step A

The cyclophane like compound 11 a, b, c, or d, dependent on which particular letter had the best activity, is benzoylated with benzoic anhydride to provide cyclophane 22.

EXAMPLE 70

Step B

Cyclophane like compound 22 is treated as described in Example 59. In this case only the benzyl moiety, which is presumed to be the active letter form Second Round screening, is placed in position 3. This provides the cyclophane like compound 23 with positions 1 and 3 fixed with benzyl moieties.

EXAMPLE 71

Step C

The cyclophane like compound 23 is treated as described in Example 60. In this case only the benzyl moiety, which is presumed to be the active letter from the First Round screening, is placed in position 4. This provides the cyclophane like compound 24 with positions 1, 3 and 4 fixed with benzyl moieties.

EXAMPLE 72

Step D

The cyclophane like compound 24 is deprotected with NaOMe in methanol. After neutralization, the solution is evaporated to dryness and the residue treated as described in Example 57, Method 1 to provide the cyclophane like compounds 25 a, b, c and d. These materials (libraries) are utilized in various screening procedures.

EXAMPLE 72A Synthesis of libraries from cyclophanes and aryl bromide using as the illustrative letters, benzyl bromide Aldrich-B133-4 [L1]; 3-methylbenzyl bromide, Aldrich-T3,550-5 [L2]; 3-methoxybenzyl bromide, Aldrich-12,965-8 [L3]; and 3-nitrobenzyl bromides, Aldrich-N1,08 4-5 [L4] Preparation of library subsets using benzyl halides in place of benzyl aldehydes

Library subsets 14 a-d, 16 a-d, 21 a-d, and 25 a-d are prepared by utilizing benzyl halides [benzyl bromide (L1), 3-methylbenzyl bromide (L2), 3-methoxybenzyl bromide (L3), and 3-nitro-benzyl bromide (L4)] corresponding to benzyl aldehydes employed in the above described synthesis and deconvolution. In this example, direct alkylation provides the combinatorialized positions directly (reduction procedures are not used).

Combinatorialization is effected as previously described with the exception that alkylation reactions with aryl bromides are used in place of the described Schiff's base reductive alkylations. Alkylation procedures provide libraries comparable to libraries synthesized by reductive alkylations. Benzyl halides are readily available from various commercial chemical suppliers.

EXAMPLE 72-B Synthesis of libraries from cyclophanes and halides using various selected halides

Using the procedure of example 73, libraries are prepared from nitrogenous macrocycles that are derivatized with one, two, three, four or more of the following halides available from Aldrich Chemical Company, Inc., Milwaukee, Wis. The Aldrich catalog number is given in the right hand column and the compound name is given in the left hand column:

13925-4 Alpha,2,4-trichlorotoluene 19349-6 2-Iodobenzyl chloride 25917-9 Alpha-3,4-trichlorotoluene 10733-6 2-Nitrobenzyl chloride 10030-7 Alpha-bromo-2,6-dichlorotoluene T5630-8 Alpha-2,6-trichlorotoluene 14011-2 4-Nitrobenzyl chloride 19164-7 3,5-Dinitrobenzyl chloride 13672-7 3-Chlorobenzyl bromide 19166-7 3-Nitrobenzyl chloride 30726-2 2,4-Dinitrobenzyl chloride 25225-5 2-Chlorobenzyl bromide C5490-2 2 Chloromethyl-4-nitrophenol 42369-6 3,5-Dinitrobenzyl chloride F760-1 2-Fluorobenzyl chloride 11196-1 4-Chlorobenzyl chloride 21811-1 2-Chloro-6-fluorobenzyl chloride F780-6 3-Fluorobenzyl chloride 11522-3 3-Chlorobenzyl chloride 19625-8 4-Chloro-2-nitrobenzyl chloride F800-4 4-Fluorobenzyl chloride 11588-6 3-Chlorobenzyl chloride 27250-7 2-Chloro-2′,4′-difluoroacetophenone 19425-5 2-Chlorobenzyl chloride 24118-0 2-Chlorobenzyl chloride 15907-7 Alpha-4-dichloroanisole 13359-0 Benzyl chloride S62774-7 2-(Chloromethyl)benzonitrile S77343-3 N-(2-Chloroethylidene)-2,4-dinitroaniline 16770-3 Alpha′-chloro-alpha,alpha,alpha-trifluoro- m-xylene 25070-8 Alpha′-chloro-alpha,alpha,alpha-trifluoro- o-xylene 36581-5 Alpha′-chloro-alpha,alpha,alpha-trifluoro- p-xylene 19875-7 4-Bromophenyl 2-chloroethyl ether 30511-1 2-Chlorophenyl 2-bromoethyl ether S67805-8 2-(2-Bromoethoxy)-5-chloro-1-nitrobenzene S60515-8 2-Bromoethyl-4-chlorophenyl ether S45235-1 1-(2-Chloroethyl)-4-fluorobenzene 19177-9 5-Methyl-2-nitrobenzyl chloride 19232-5 5-Methyl-3-nitrobenzyl chloride 19536-7 2-Methyl-3-nitrobenzyl chloride C7330-3 Alpha-chloro-o-xylene S43061-7 Beta-chlorophenetole S92214-5 3-Methyl-4-nitrobenzyl chloride C7335-4 Alpha-chloro-m-xylene C7340-0 Alpha-chloro-p-xylene 20938-4 3-Methoxybenzyl chloride 41760-2 2-Chloroethylphenyl sulfide 27024-5 4-Methoxybenzyl chloride 26340-0 3,5 Bis(trifluoromethyl)benzyl chloride S61404-1 2 Chloroethyl-4-chlorophenyl sulfide C4040-5 (2-chloroethyl)benzene S44579-7 4′-Bromo-3-chloropropiophenone S65169-9 2-Chloroethyl-4-nitrobenzoate 13515-1 3-Chloro-4′-fluoropropiophenone 33561-4 3-Chloropropiophenone S88196-1 Benzyl-2-chloroacetate S83340-1 3-Chloropropyl-2,4-dichlorophenyl ether S53571-0 3-Chloropropyl-4-fluorophenyl ether 12640-3 2,5-Dimethylbenzyl chloride C6810-5 1-Chloro-3-phenylpropane S80872-5 2,5-Dimethoxybenzyl chloride D15060-6 3,4-Dimethylbenzyl chloride S56939-9 3-Chloropropyl-4-nitrophenyl ether S79921-1 3-Chloropropyl-phenyl sulfide S79298-5 3-Chloropropyl-phenyl ether S83280-4 2-Chloroethyl-p-tolyl sulfide S63793-9 4-Chlorobenzyl-2-chloroethyl sulfide 33026-4 3,5-Dimethoxybenzyl chloride S37787-2 N-(2-Chloroethyl)benzylamine HCl 36344-8 4-Chlorobutyrophinone S55923-7 7-Chloro-p-cymene S66335-2 2,4,5-Trimethylbenzyl chloride S56937-2 1-(2-(2-Chloroethoxy)-ethoxy)-4- nitrobenzene P1530-7 4-Phenoxybutyl chloride S40755-0 4,6-Bis(chloromethyl)-m-xylene 13698-0 Alpha-2-chloroisodurene 24650-6 1-Chloro-2-methyl-2-phenylpropane S34433-8 4-Chloro-4′-methylbutyrophenone S95372-5 4-Bromophenyl-3-chloro-2,2- dimethylpropionate 39086-0 4-Chlorobutylbenzoate S79927-0 3-Chloro-1-methylpropylphenyl sulfide S34430-3 4-Chloro-4′-methoxybutyrophenone S79928-9 3-Chloropropyl-m-toluyl sulfide S42717-9 N-(2-Chloroethyl)-N-methylbenzylamine hydrochloride S52026-8 4-tert-Butyl-1-chloromethyl-2-nitrobenzene D6560-7 2,4-Bis(chloromethyl)-1,3,5- trimethylbenzene 19153-1 4-(tert-Butyl)benzyl chloride S62686-4 2,3,5,6-Tetramethylbenzyl chloride S87624-0 (+)-1-Chloro-3-methyl-2-phenylbutane S35320-5 4-(2-Methylphenoxy)butyl chloride S37684-1 N-(2-chloroethyl)-N-ethylbenzylamine HCl S36329-4 3-Methoxy-3-(4-tolyl)-propyl chloride S42735-7 N-(3-Chloropropyl)-N-methylbenzylamine HCl S34414-1 4-Chloro-3′,4′-dimethylbutyrophenone S36370-7 4-(3-Methylphenoxy)butyl chloride S66008-6 N-(2-Chloroethyl)-N-ethyl-m-toluidine S34420-6 4-Chloro-4′-ethylbutyrophenone S36371-5 4-(4-methylphenoxy)butyl chloride S34409-5 4-Chloro-2′,4′-dimethoxybutyrophenone S79934-3 5-Chloropentylphenyl sulfide S52555-3 5-Chloro-2-(o-tolyl)-valeronitrile S52133-7 Alpha-chloro-4-(tert-pentyl)-toluene S87628-3 (+)-1-Chloro-3,3-dimethyl-2-phenylbutane S35168-7 3-Isopropoxy-3-phenylpropyl chloride 10086-2 3,6-Bis(chloromethyl)durene S37754-6 1-Chloro-3-mesityloxy-2-propanol S66289-5 Alpha,alpha-3-dichlorohexamethylbenzene S86989-9 1,2-Bis(chloromethyl)-3,4,5,6- tetramethylbenzene S86009-3 1,4-Bis(chloromethyl)-2,5-diethoxybenzene S52500-6 2-Chloromethyl-4-nitrophenylheptyl ether S54873-1 2-(2-Chloroethyl)-2-phenylpentanenitrile S36287-5 3-Isopropoxy-3-(p-toluyl)propyl chloride B9140-4 4′-tert-Butyl-4-chlorobutyrophenone

EXAMPLE 73 Synthesis of libraries from cyclophanes and aryl acid halides using as the illustrative letters, benzoyl chloride Aldrich-[L1]; 3-methylbenzoyl chloride Aldrich-T3,550-5 [L2]; 3-methoxybenzoyl chloride, Aldrich-12,965-8 [L3]; and 3-nitrobenzoyl chloride Aldrich-N1,084-5 [L4]

Preparation of library subsets 14 a-d, 16 a-d, 21 a-d, and 25 a-d using benzoic acids and benzoic acid derivatives is effected in place of benzyl aldehydes or benzyl halides described above.

Library subsets 14 a-d, 16 a-d, 21 a-d, and 25 a-d are prepared by utilizing substituted benzoic acid halides to acylate the primary amine and secondary and primary oxyamines followed by reduction of the resultant amide bond to afford a benzyl moiety combinatorialized at each selected site in the polyamine/oxyamine. Benzoic acid chloride (L1), 3-methylbenzoic chloride (L2), 3-methoxybenzoic chloride (L3), and 3-nitro-benzoic chloride (L4)] corresponding to benzyl bromides and benzaldehydes employed in the initial synthesis are employed in this approach.

Combinatorialization is continued as described above except acylation reactions with benzoic acid chlorides are used in place of Schiff's base reductive alkylations. Acylation procedures provide libraries comparable to libraries synthesized by reductive or alkylations. Benzoic acid halides are readily available from various commercial chemical suppliers.

EXAMPLE 73-B Synthesis of libraries from cyclophanes and aryl acid halides using various selected acid halides

Using the procedure of example 73, libraries are prepared from nitrogenous macrocycles that are derivatized with one, two, three, four or more of the following acid halides available from Aldrich Chemical Company, Inc., Milwaukee, Wis. The Aldrich catalog number is given in the right hand column and the compound name is given in the left hand column:

10663-1 p-Toluoyl chloride 30253-8 3-Cyanobenzoyl chloride 13096-6 (+/−)-2-cloro-2-phenylacetyl chloride 26366-4 3-(Chloromethyl)benzoyl chloride 27078-4 4-(Chloromethyl)benzoyl chloride 24947-5 4-(Trifluoromethyl)benzoyl chloride 19394-1 4-Chlorophenoxyacetyl chloride 24948-3 2-(Trifluoromethyl)benzoyl chloride 19394-1 4-chlorophenoxyacetyl chloride 24948-3 2-(Trifluoromethyl)benzoyl chloride 10663-1 p-Toluoyl chloride 25027-9 3-(Trifluoromethyl)benzoyl chloride S67828-7 2-(2,4,5-Trichlorophenoxy)acetyl chloride 12201-7 o-Toluoyl chloride 40248-6 4-(Trifluoromethoxy)benzoyl chloride 37502-0 3-(Dichloromethyl) benzoyl chloride 12225-4 m-Toluoyl chloride 12482-6 4-Cyanobenzoyl chloride P1675-3 Phenylacetyl chloride S88415-4 2-(Phenylthio)propionyl chloride 15862-3 Phenoxyacetyl chloride 36475-4 trans-4-Nitrocinnamoyl chloride 28882-9 4-Ethoxybenzoyl chloride 23024-3 m-Anisoyl chloride S67595-4 2,3-Dibromo-3-phenylpropionyl chloride 30101-9 Benzyloxyacetyl chloride 25470-3 o-Anisoyl chloride C8110-1 Cinnamoyl chloride 31693-8 3-Methoxyphenylacetyl chloride A8847-6 p-Anisoyl chloride 16519-0 Acetylsalicyloyl chloride 36569-6 4-Methoxyphenylacetyl chloride 24944-0 Hydrocinnamoyl chloride 26528-4 3,5-Bis(trifluoromethyl)benzoyl chloride 28350-94 Ethylbenzoyl chloride S40503-5 2-phenoxypropionyl chloride 33304-2 2,5-Bis(trifluoromethyl)benzoyl chloride S62043-2 p-Tolylacetyl chloride 16171-3 3,5-Dimethoxybenzoyl chloride 42339-4 (R)-(−)-A-Methoxy-A-(trifluoromethyl)- phenylacetyl chloride 26480-6 2,5-Dimethoxyphenylacetyl chloride 25804-0 3,4-Dimethoxybenzoyl chloride T6980-9 3,4,5-Trimethoxybenzoyl chloride 26242-0 2,6-Dimethoxybenzoyl chloride 13430-9 trans-2-Phenyl-1-cyclopropanecarbonyl chloride S62264-8 5-(Dimethylsulfamoyl)-2-methoxybenzoyl chloride 37383-4 2,4-Dimethoxybenzoyl chloride A1740-4 o-Acetylmandelic chloride 24945-9 4-Phenyl-1,2,3,4-tetrachloro-1,3-butadiene- 1-carbonyl cloride 36848-2 trans-3-(trifluoromethyl)cinnamoyl chloride 15712-0 4-tert-butylbenzoyl chloride S42860-4 2-Phenylbutyryl chloride 22203-8 4-Butylbenzoyl chloride 23747-7 3,4-Dimethoxyphenylacetyl chloride 22204-6 4-Butoxybenzoyl chloride S65659-3 2-(4-Chlorobenzoyl)benzoyl chloride 22214-3 4-Pentylbenzoyl chloride C3928-8 2-Chloro-2,2-diphenylacetyl chloride S43639-9 4-(4-Nitrophenylazo)benzoyl chloride 33158-9 Diphenylacetyl chloride S80926-8 4-(Phenylazo)benzoyl chloride S61661-3 2-Diphenylacetyl chloride 16114-4 4-Biphenylcarbonyl chloride 22209-7 4-Hexylbenzoyl chloride 22205-4 4-Heptyloxybenzoyl chloride 22211-9 4-Hexyloxybenzoyl chloride 22206-2 4-Heptyloxybenzoyl chloride

EXAMPLE 74 Preparation of 1,2,5,8-tetraaza-9-oxa-1-methyl-5-(tosyl)undecano-[2,4]-6-azidoethoxy-s-triazinophane

(Step 1)

1,3,5-triazine-2-azidoethoxy-4-aminooxy-6-(1-methylhydrazine

A cold solution of cyanuric chloride in acetonitrile is treated sequentially in the following order with the following solutions: one equivalent of azidoethanol one equivalent of sodium hydride in acetonitrile; one equivalent of N-hydroxyphthalamide/one equivalent of sodium hydride; and 3.5 equivalents of methylhydrazine. The sequential reactions are each cooled prior to addition of the reactants and then allowed to warm to room temperature and stirred at ambient temperature for 5-24 hours before adding the next reactant. The reaction with methyl hydrazine is refluxed for 3-24 hours to obtain final chloride displacement and removal of the phthaloyl protecting group. The reaction mixture is cooled, filtered and taken to dryness by evaporation under reduced pressure. Purification by silica gel flash column chromatography will provide the title compound.

Step 2

Disuccinimidyl N-(t-boc)iminodiacetate

Prepared according to a synthesis described by T. J. McMurry, et al., Bioconjugate Chem., 1992, 3, 108-117. Disuccinimidyl derivatives of imino-di-acids can be prepared as described by this general procedure.

Step 3

1,2,5,8-tetraaza-9-oxa-1-methyl-5-(p-methylsulfonyl)undecano-[2,4]-6-azidoethoxy-s-triazinophane

A solution of 1,3,5-triazine-2-azidoethoxy-4-aminooxy-6-(1-methylhydrazine) (one equivalent) in DMF is reacted with a solution of disuccinimidyl N-(t-boc)iminodiacetate (one equivalent) in DMF and triethylamine (two equivalents) under high dilution conditions at 20-100° C. for over 5 to 24 hours. The solution is evaporated to dryness under reduced pressure. The residue is dissolved in HCl/MeOH and kept at ambient temperature for 5 to 24 hours before evaporating to dryness. The residue is treated with pyridine/p-toluene sulfonyl chloride. After heating at ambient temperature to 80° C. for 5 to 24 hours the solution is evaporated to dryness. The residue is dissolved in dry THF and treated with BH₃ THF at 0° C. for one hour and then at 45° C. to ambient temperature for 24 to 48 hours. The solution is treated with MeOH and then evaporated to dryness. This process is repeated. The final residue is dissolved in EtOH and the solution is saturated with gaseous HCl at 0° C. This solution is refluxed for 5 to 24 hours and evaporated to dryness. The residue is triturated with ether and then dissolved in H₂O and treated with saturated NaHCO₃. The mixture is extracted with ethyl acetate several times. The ethyl acetate solution is treated with HCl/MeOH and evaporated to dryness to provide the title compound as its hydrochloride salts.

EXAMPLE 75 Preparation of 2,5,9-triaza-1,10-dioxa-5-(tosyl)-decano-[2,4]-6-azidoethoxy-1,3,5-triazinophane

The title compound is prepared as per the general procedure of Example 74. The heterocyclic used is 2-azidoethoxy-4,6-di-(O-phthalimido)-s-triazine. It is reacted with succinimidyl-N-tosyl-(N-hydroxysuccinimidylacetate)-β-alanine to give the title compound. The intermediate diamide compound can be used if it is desired to include amide type nitrogenous moieties in the bridge. Alternately, it can be reduce as per Example 74 to a bridge that includes two hydroxyamine moieties.

EXAMPLE 76 Preparation of 1,2,5,9,10-penta-aza-1,10-dimethyl-5-(tosyl)-decano-[2,4]-6-azidoethoxy-1,3,5-triazinophane

The title compound is prepared as per the general procedure of Example 74. The heterocycle used is 2-azidoethoxy-4,6-di-(N-methyl hydrazino)-s-triazine. It is reacted with succinimidyl-N-tosyl-(N-hydroxysuccinimidylacetate)-β-alanine to give the title compound.

The intermediate dihydrazide compound can be used if it is desired to include hydrazide type nitrogenous moieties in the bridge. Alternately, it can be reduce as per Example 74 to a bridge that includes two hydrazine moieties.

EXAMPLE 77 Preparation of 4,7,11-triaza-1,10,14-trioxa-7-(tosyl)-decano-[2,4]-6-azidoethoxy-1,3,5-triazinophane

The title compound is prepared as per the general procedure of Example 74. The heterocycle used is 4-aminopropoxy-2-azidoethoxy-6-hydroxylaminoethoxy-s-triazine. It is reacted with succinimidyl-N-tosyl-(N-hydroxysuccinimidylacetate)-β-alanine to give the title compound. The intermediate amide-N-(hyroxyamide) compound can be used if it is desired to include amide and N-hydroxyamide type nitrogenous moieties in the bridge. Alternately, it can be reduce as per Example 74 to a bridge that include an amine and a hydroxyamine moiety.

EXAMPLE 78

Preparation of 4,7,11-triaza-10-oxa-1,14-dithia-7-(tosyl)-tetradecano-[2,4]-6-azidoethoxy-s-triazinophane

The title compound is prepared as per the general procedure of Example 74. The heterocycle used is 4-aminopropanthial-2-azidoethoxy-6-hydroxylaminoethanthial-s-triazine. It is reacted with succinimidyl-N-tosyl-(N-hydroxysuccinimidylacetate)-β-alanine to give the title compound. The intermediate amide-N-(hyroxyamide) compound can be used if it is desired to include amide and N-hydroxyamide type nitrogenous moieties in the bridge. Alternately, it can be reduce as per Example 74 to a bridge that include an amine and a hydroxyamine moiety.

EXAMPLE 79 Preparation of 4,7,11-Triaza-1,10,14-trioxa-7-(tosyl)tetradecano-[2,4]-6-azidoethoxy-1,3,5-triazinophane

The title compound is prepared as per the general procedure of Example 74. The heterocycle used is 2-azidoethoxy-4,6-diaminoethoxy-s-triazine. It is reacted with succinimidyl-N-tosyl-(N-hydroxysuccinimidylacetate)-β-alanine to give the title compound. The intermediate diamide compound can be used if it is desired to include amide type nitrogenous moieties in the bridge. Alternately, it can be reduce as per Example 74 to a bridge that include an amine moieties.

Evaluation

Procedure 1

Antimicrobial Assay

Staphylococcus aureus

Staphylococcus aureus is known to cause localized skin infections as a result of poor hygiene, minor trauma, psoriasis or eczema. It also causes respiratory infections, pneumonia, toxic shock syndrome and septicemia. It is a common cause of acute food poisoning. It exhibits rapid emergence of drug resistance to penicillin, cephalosporin, vancomycin and nafcillin.

In this assay, the strain S. aureus ATCC 25923 (American Type Culture Collection) is used in the bioassay. To initiate the exponential phase of bacterial growth prior to the assay, a sample of bacteria grown overnight at 37° C. in typtocase soy broth (BBL) is used to reinoculate sample wells of 96-well microtiter plates. The assays are carried out in the 96-well microtiter plates in 150 μL volume with approximately 1×10⁶ cells per well.

Bacteria in typtocase soy broth (75 μL) is added to the compound mixtures in solution in 75μ water in the individual well of the microtiter plate. Final concentrations of the compound mixtures are 25 μM, 10 μM and 1 μM. Each concentration of the compound mixtures are assayed in triplicate. The plates are incubated at 37° C. and growth monitored over a 24 hour period by measuring the optical density at 595 nm using a BioRad model 3550 UV microplate reader. The percentage of growth relative to a well containing no compound is determined. Ampicillin and tetracycline antibiotic positive controls are concurrently tested in each screening assay.

Procedure 2

Antimicrobial Mechanistic Assay

Bacterial DNA Gyrase

DNA gyrase is a bacterial enzyme which can introduce negative supercoils into DNA utilizing the free energy derived from ATP hydrolysis. This activity is critical during DNA replication and is a well characterized target for antibiotic inhibition of bacterial growth. In this assay, libraries of compounds are screened for inhibition of DNA gyrase. The assay measures the supercoiling of a relaxed plasmid by DNA gyrase as an electrophoretic shift on an agarose gel. Initially all library pools are screened for inhibitory activity at 30 μM and then a dose response analysis is effected with active subsets. Novobiocin, an antibiotic that binds to the β subunit of DNA gyrase is used as a positive control in the assay. The sensitivity of the DNA gyrase assay was determined by titrating the concentration of the know DNA gyrase inhibitor, Novobiocin, in the supercoiling assay. The IC₅₀ was determined to be 8 nM, sufficient to identify the activity of a single active species of comparable activity in a library having 30 μM concentration.

Procedure 3

Use of a Combinatorial Library for Identifying of Metal Chelators and Imaging Agents

This procedure is used to identify compounds of the invention from libraries of compounds constructed to include a ring that contains an ultraviolet chromophore. Further the diversity groups attached to the compound bridge are selected from metal binders, coordinating groups such as amine, hydroxyl and carbonyl groups, and other groups having lone pairs of electrons, such that the macromolecules can form coordination complexes with heavy metals and imaging agents. The procedure is used to identify macromolecules for chelating and removing heavy metals from industrial broths, waste stream eluents, heavy metal poisoning of farm animals and other sources of contaminating heavy metals, and for use in identifying imaging agent carriers, such as carriers for technetium 99.

An aliquot of a test solution having the desired ion or imaging agent at a known concentration is added to an aliquot of standard solution of the pool under assay. The UV spectrum of this aliquot is measured and is compared to the UV spectrum of a further aliquot of the same solution lacking the test ion or imaging agent. A shift in the extinction coefficient is indicative of binding of the metal ion or imaging ion to a compound in the library pool being assayed.

Procedure 4

Assay of Combinatorial Library for PLA₂ Inhibitors

A preferred target for assay of combinatorially generated pools of compounds is the phospholipase A₂ family. Phospholipases A₂ (PLA₂) are a family of enzymes that hydrolyze the sn-2 ester linkage of membrane phospholipids resulting in release of a free fatty acid and a lysophospholipid (Dennis, E. A., The Enzymes, Vol. 16, pp. 307-353, Boyer, P. D., ed., Academic Press, New York, 1983). Elevated levels of type II PLA₂ are correlated with a number of human inflammatory diseases. The PLA₂-catalyzed reaction is the rate-limiting step in the release of a number of pro-inflammatory mediators. Arachidonic acid, a fatty acid commonly linked at the sn-2 position, serves as a precursor to leukotrienes, prostaglandins, lipoxins and thromboxanes. The lysophospholipid can be a precursor to platelet-activating factor. PLA₂ is regulated by pro-inflammatory cytokines and, thus, occupies a central position in the inflammatory cascade (Dennis, ibid.; Glaser et al., TiPs Reviews 1992, 14, 92; and Pruzanski et al., Inflammation 1992, 16, 451). All mammalian tissues evaluated thus far have exhibited PLA₂ activity. At least three different types of PLA₂ are found in humans: pancreatic (type I), synovial fluid (type II) and cytosolic. Studies suggest that additional isoenzymes exist. Type I and type II, the secreted forms of PLA₂, share strong similarity with phospholipases isolated from the venom of snakes. The PLA₂ enzymes are important for normal functions including digestion, cellular membrane remodeling and repair, and in mediation of the inflammatory response. Both cytosolic and type II enzymes are of interest as therapeutic targets. Increased levels of the type II PLA₂are correlated with a variety of inflammatory disorders including rheumatoid arthritis, osteoarthritis, inflammatory bowel disease and septic shock, suggesting that inhibitors of this enzyme would have therapeutic utility. Additional support for a role of PLA₂ in promoting the pathophysiology observed in certain chronic inflammatory disorders was the observation that injection of type II PLA₂ into the footpad of rats (Vishwanath et al., Inflammation 1988, 12, 549) or into the articular space of rabbits (Bomalaski et al., J. Immunol. 1991, 146, 3904) produced an inflammatory response. When the protein was denatured before injection, no inflammatory response was produced.

The type II PLA₂ enzyme from synovial fluid is a relatively small molecule (about 14 kD) and can be distinguished from type I enzymes (e.g. pancreatic) by the sequence and pattern of its disulfide bonds. Both types of enzymes require calcium for activity. The crystal structures of secreted PLA₂ enzymes from venom and pancreatic PLA₂, with and without inhibitors, have been reported (Scott et al., Science 1990, 250, 1541). Recently, the crystal structure of PLA₂ from human synovial fluid has been determined (Wery et al., Nature 1991, 352, 79). The structure clarifies the role of calcium and amino acid residues in catalysis. Calcium acts as a Lewis acid to activate the scissile ester carbonyl bond of 1,2-diacylglycerophospholipids and binds to the lipid, and a His-Asp side chain diad acts as a general base catalyst to activate a water molecule nucleophile. This is consistent with the absence of any acyl enzyme intermediates, and is also comparable to the catalytic mechanism of serine proteases. The catalytic residues and the calcium ion are at the end of a deep cleft (ca. 14 Å) in the enzyme. The walls of this cleft contact the hydrocarbon portion of the phospholipid and are composed of hydrophobic and aromatic residues. The positively-charged amino-terminal helix is situated above the opening of the hydrophobic cleft. Several lines of evidence suggest that the N-terminal portion is the interfacial binding site (Achari et al., Cold Spring Harbor Symp. Quant. Biol. 1987, 52, 441; Cho et al., J. Biol. Chem. 1988, 263, 11237; Yang et al., Biochem. J. 1989, 262, 855; and Noel et al., J. Am. Chem. Soc. 1990, 112, 3704).

Much work has been reported in recent years on the study of the mechanism and properties of PLA₂-catalyzed hydrolysis of phospholipids. In in vitro assays, PLA₂ displays a lag phase during which the enzyme adsorbs to the substrate bilayer and a process called interfacial activation occurs. This activation may involve desolvation of the enzyme/lipid interface or a change in the physical state of the lipid around the cleft opening. Evidence favoring this hypothesis comes from studies revealing that rapid changes in PLA₂ activity occur concurrently with changes in the fluorescence of a membrane probe (Burack et al., Biochemistry 1993, 32, 583). This suggests that lipid rearrangement is occurring during the interfacial activation process. PLA₂ activity is maximal around the melting temperature of the lipid, where regions of gel and liquid-crystalline lipid coexist. This is also consistent with the sensitivity of PLA₂ activity to temperature and to the composition of the substrate, both of which can lead to structurally distinct lipid arrangements separated by a boundary region. Fluorescence microscopy was used to simultaneously identify the physical state of the lipid and the position of the enzyme during catalysis (Grainger et al., FEBS Lett. 1989, 252, 73). These studies clearly show that PLA₂ binds exclusively at the boundary region between liquid and solid phase lipid. While the hydrolysis of the secondary ester bond of 1,2-diacylglycerophospholipids catalyzed by the enzyme is relatively simple, the mechanistic and kinetic picture is clouded by the complexity of the enzyme-substrate interaction. A remarkable characteristic of PLA₂ is that maximal catalytic activity is observed on substrate that is aggregated (i.e. phospholipid above its critical micelle concentration), while low levels of activity are observed on monomeric substrate. As a result, competitive inhibitors of PLA₂ either have a high affinity for the active site of the enzyme before it binds to the substrate bilayer or partition into the membrane and compete for the active site with the phospholipid substrate. Although a number of inhibitors appear to show promising inhibition of PLA₂ in biochemical assays (Yuan et al., J. Am. Chem. Soc. 1987, 109, 8071; Lombardo et al., J. Biol. Chem. 1985, 260, 7234; Washburn et al., J. Biol. Chem. 1991, 266, 5042; Campbell et al., J. Chem. Soc., Chem. Commun. 1988, 1560; and Davidson et al., Biochem. Biophys. Res. Commun. 1986, 137, 587), reports describing in vivo activity are limited (Miyake et al., J. Pharmacol. Exp. Ther. 1992, 263, 1302).

In one preferred embodiment, macromolecules of the invention are selected for their potential to interact with, and preferably inhibit, the enzyme PLA₂. Thus, compounds of the invention can be used for topical and/or systemic treatment of inflammatory diseases including atopic dermatitis and inflammatory bowel disease. In selecting the functional groups, advantage can be taken of PLA₂'s preference for anionic vesicles over zwitterionic vesicles.

Preferred compounds of the invention for assay for PLA₂ include those having aromatic diversity groups to facilitate binding to the cleft of the PLA₂ enzyme (Oinuma et al., J. Med. Chem. 1991, 34, 2260; Marki et al., Agents Actions 1993, 38, 202; and Tanaka et al., J. Antibiotics 1992, 45, 1071). Benzyl and 4-hexylbenzyl groups are preferred aromatic diversity groups. PLA₂-directed macromolecule compounds of the invention can further include hydrophobic functional groups such as tetraethylene glycol groups. Since the PLA₂ enzyme has a hydrophobic channel, hydrophobicity is believed to be an important property of inhibitors of the enzyme.

After each round of synthesis as described in the above examples, the resulting pools of compounds are screened for inhibition of human type II PLA₂ enzymatic activity. The assay is effected at the conclusion of each round of synthesis to identify the wining pool from that round of synthesis. Concurrently, the libraries additionally can be screened in other in vitro assays to determine further mechanisms of inhibition.

The pools of the macrocyclic libraries are screened for inhibition of PLA₂ in the assay using E. coli labeled with ³H-oleic acid (Franson et al., J. Lipid Res. 1974, 15, 380; and Davidson et al., J. Biol. Chem. 1987, 262, 1698) as the substrate. Type II PLA₂ (originally isolated from synovial fluid), expressed in a baculovirus system and partially purified, serves as a source of the enzyme. A series of dilutions of each the library pools is done in water: 10 μl of each pool is incubated for 5 minutes at room temperature with a mixture of 10 μl PLA₂, 20 μl 5X PLA₂ Buffer (500 mM Tris 7.0-7.5, 5 mM CaCl₂), and 50 μl water. Samples of each pool are run in duplicate. At this point, 10 μl of ³H E. coli cells is added. This mixture is incubated at 37° C. for 15 minutes. The enzymatic reaction is stopped with the addition of 50 μl 2M HCL and 50 μl fatty-acid-free BSA (20 mg/ml PBS), vortexed for 5 seconds, and centrifuged at high speed for 5 minutes. 165 μl of each supernate is then put into a scintillation vial containing 6 ml of scintillant (ScintiVerse) and cpms are measured in a Beckman Liquid Scintillation Counter. As a control, a reaction without the combinatorial pool is run alongside the other reactions as well as a baseline reaction containing no macromolecules as well as no PLA₂ enzyme. CPMs are corrected for by subtracting the baseline from each reaction data point.

Confirmation of the “winners” is made to confirm that the macromolecule binds to enzyme rather than substrate and that the inhibition of any macromolecule selected is specific for type II PLA₂. An assay using ¹⁴C-phosphatidyl ethanolamine (¹⁴C-PE) as substrate, rather than E. coli membrane, is used to insure enzyme rather than substrate specificity. Micelles of ¹⁴C-PE and deoxycholate are incubated with the enzyme and oligomer. ¹⁴C-labeled arachidonic acid released as a result of PLA₂-catalyzed hydrolysis is separated from substrate by thin layer chromatography and the radioactive product is quantitated. The “winner” is compared to phosphatidyl ethanolamine, the preferred substrate of human type II PLA₂, to confirm its activity. PLA₂ from other sources (snake venom, pancreatic, bee venom) and phospholipase C, phospholipase D and lysophospholipase can be used to further confirm that the inhibition is specific for human type II PLA₂.

Procedure 5

Probes for the Detection of Specific Proteins and mRNA in Biological Samples

For the reliable, rapid, simultaneous quantification of multiple varieties of proteins or mRNA in a biological sample without the need to purify the protein or mRNA from other cellular components, a protein or mRNA of interest from a suitable biological sample, i.e., a blood borne virus, a bacterial pathogen product in stool, urine and other like biological samples, is identified using standard microbiological techniques. A probe comprising a macrocycle compound of the invention is identified by a combinatorial search as noted in the above examples. Preferred for the mRNA probe are compounds synthesized to include “nucleobase” diversity groups (adenine, guanine, thymine and cytosine as the letters) complementary to at least a portion of the nucleic acid sequence of the mRNA. Preferred for the protein probe are compounds synthesized to include chemical functional groups that act as hydrogen bond donors and acceptors, sulfhydryl groups, hydrophobic lipophilic moieties capable of hydrophobic interactions groups and groups capable of ionic interactions. The probe is immobilized on insoluble CPG solid support utilizing the procedure of Pon, R. T., Protocols for Oligonucleotides and Analogs, Agrawal, S., Ed., Humana Press, Totowa, N.J., 1993, p 465-496. A known aliquot of the biological sample under investigation is incubated with the insoluble CPG support having the probe thereon for a time sufficient to hybridize the protein or mRNA to probe and thus to link them via the probe to the solid support. This immobilizes protein or mRNA present in the sample to the CPG support. Other non-immobilized materials and components are then washed off the CPG with a wash media suitable for use with the biological sample. The mRNA on the support is labelled with ethidium bromide, biotin or a commercial radionucleotide and the amount of label immobilized on the CPG support is measured to indicate the amount of mRNA present in the biological sample. In a similar a protein is also labeled and quantified.

Procedure 6

Leukotriene B₄ Assay

Leukotriene B₄ (LTB₄) has been implicated in a variety of human inflammatory diseases, and its pharmacological effects are mediated via its interaction with specific surface cell receptors. Library subsets are screened for competitive inhibition of radiolabeled LTB₄ binding to a receptor preparation.

A Nenquest™ Drug Discovery System Kit (NEN Research Products, Boston, Mass.) is used to select an inhibitor of the interaction of Leukotriene B₄ (LTB₄) with receptors on a preparation of guinea pig spleen membrane. [³H] Leukotriene B₄ reagent is prepared by adding 5 mL of ligand diluent (phosphate buffer containing NaCl, MgCl₂, EDTA and Bacitracin, pH 7.2) to 0.25 mL of the radioligand. The receptor preparation is made by thawing the concentrate, adding 35 mL of ligand diluent and swirling gently in order to resuspend the receptor homogeneously. Reagents are kept on ice during the course of the experiment, and the remaining portions are stored at −20° C.

Library subsets prepared as per general procedure of examples above are diluted to 5 μM, 50 μM and 500 μM in phosphate buffer (1×PBS, 0.1% azide and 0.1% BSA, pH 7.2), yielding final test concentrations of 0.5 μM, 5 μM and 50 μM, respectively. Samples are assayed in duplicate. [³H] LTB₄ (25 μL) is added to 25 μL of either appropriately diluted standard (unlabeled LTB₄) or library subset. The receptor suspension (0.2 mL) is added to each tube. Samples are incubated at 40° C. for 2 hours. Controls include [³H] LTB₄ without receptor suspension (total count vials), and sample of ligand and receptor without library molecules (standard).

After the incubation period, the samples are filtered through GF/B paper that had been previously rinsed with cold saline. The contents of each tube are aspirated onto the filter paper to remove unbound ligand from the membrane preparation, and the tubes washed (2×4 mL) with cold saline. The filter paper is removed from the filtration unit and the filter disks are placed in appropriate vials for scintillation counting. Fluor is added, and the vials shaken and allowed to stand at room temperature for 2 to 3 hours prior to counting. The counts/minute (cpm) obtained for each sample are subtracted from those obtained from the total count vials to determine the net cpm for each sample. The degree of inhibition of binding for each library subset is determined relative to the standard (sample of ligand and receptor without library molecules).

Those skilled in the art will appreciate that numerous changes and modifications may be made to the preferred embodiments of the invention and that such changes and modifications may be made without departing from the spirit of the invention. It is therefore intended that the appended claims cover all such equivalent variations as fall within the true spirit and scope of the invention. 

What is claimed is:
 1. A compound of the structure:

wherein X is (—T—L)_(y) y is 0-3 each T is, independently, a single bond, a methylene group or a group having the structure —{[CR¹R²]_(m)—B—[CR¹R²]_(n)—[C(D)]_(p)—E—}_(q)— where: D is ═O, ═S, ═NR³; B and E, independently, are a single bond, CH═CH, C═C, O, S, NR³, or C₆-C₁₄ aryl; each R¹, R² and R³ is, independently, H, alkyl or haloalkyl having 1 to about 10 carbon atoms; alkenyl having 2 to about 10 carbon atoms; alkynyl having 2 to about 10 carbon atoms; or aryl having 6 to about 14 carbon atoms; m and n, independently, are zero to 5; p is zero or 1; q is 1 to about 10; and each L is, independently, H, C₂-C₁₀ alkyl or substituted alkyl, C₂-C₁₀ alkenyl or substituted alkenyl, C₂-C₁₀ alkynyl or substituted alkynyl, C₄-C₇ carbocyclic alkyl, alkenyl or alkynyl or substituted carbocyclic, or C₆-C₁₄ aryl or substituted aryl where the substituent groups are selected from hydroxyl, amino, alkoxy, alcohol, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl, or alkynyl groups, an ether having 2 to 10 carbon atoms and 1 to 4 oxygen or sulfur atoms, a nitrogen-containing heterocycle, a sulfur-containing heterocycle, an oxygen-containing heterocycle, a metal coordination group, a conjugate group, halogen, hydroxyl (OH), thiol (SH), keto (C═O), carboxyl (COOH), amide (CONR), amidine (C(═NH)NRR), guanidine (NHC(═NH)NRR), glutamyl, nitrate (ONO₂), nitro (NO₂), nitrile (CN), trifluoromethyl (CF₃), trifluoromethoxy (OCF₃), O-alkyl, S-alkyl, NH-alkyl, N-dialkyl, O-aralkyl, S-aralkyl, NH-aralkyl, amino (NH₂), azido (N₃), hydrazino (NHNH₂), hydroxylamino (ONH₂), sulfoxide (SO), sulfone (SO₂), sulfide (S—), disulfide (S—S), silyl, a nucleosidic base or an amino acid side chain, wherein R is H or alkyl.
 2. The compound of claim 1 wherein one of said —T—L groups is different from each of the other said —T—L groups.
 3. The compound of claim 1 wherein two of said —T—L groups are different from each of the other said —T—L groups.
 4. The compound of claim 1 wherein three of said —T—L groups are different from the fourth —T—L group.
 5. The compound of claim 1 wherein each of said —T—L groups is different from each of the other said —T—L groups.
 6. The compound of claim 1 wherein said X is H, —NH₂, —CH₃, CHBr₂, —O—(CH₂)₂—N₃, —O—(CH₂)₃—N₃ or —(CH₂)₂—N₃. 